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23068809 = 3216012
BaseRepresentation
bin101100000000…
…0000010001001
31121102000110100
41120000002021
521401200214
62142240013
7400040001
oct130000211
947360410
1023068809
1112026a35
127886009
134a191aa
1430c7001
15205a309
hex1600089

23068809 has 9 divisors (see below), whose sum is σ = 33342439. Its totient is φ = 15369600.

The previous prime is 23068783. The next prime is 23068817. The reversal of 23068809 is 90886032.

The square root of 23068809 is 4803.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 23011209 + 57600 = 4797^2 + 240^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 23068809 - 25 = 23068777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23068819) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13609 + ... + 15209.

Almost surely, 223068809 is an apocalyptic number.

23068809 is the 4803-rd square number.

23068809 is the 2402-nd centered octagonal number.

It is an amenable number.

23068809 is a deficient number, since it is larger than the sum of its proper divisors (10273630).

23068809 is an frugal number, since it uses more digits than its factorization.

23068809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208 (or 1604 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The cubic root of 23068809 is about 284.6700151225.

Multiplying 23068809 by its sum of digits (36), we get a square (830477124 = 288182).

Multiplying 23068809 by its product of nonzero digits (20736), we get a square (478354823424 = 6916322).

The spelling of 23068809 in words is "twenty-three million, sixty-eight thousand, eight hundred nine".

Divisors: 1 3 9 1601 4803 14409 2563201 7689603 23068809