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23074721 = 191214459
BaseRepresentation
bin101100000000…
…1011110100001
31121102022120022
41120001132201
521401342341
62142323225
7400063145
oct130013641
947368508
1023074721
111203041a
127889515
134a1baa7
1430c9225
15205be4b
hex16017a1

23074721 has 4 divisors (see below), whose sum is σ = 24289200. Its totient is φ = 21860244.

The previous prime is 23074699. The next prime is 23074741. The reversal of 23074721 is 12747032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23074721 - 210 = 23073697 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23074741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607211 + ... + 607248.

It is an arithmetic number, because the mean of its divisors is an integer number (6072300).

Almost surely, 223074721 is an apocalyptic number.

It is an amenable number.

23074721 is a deficient number, since it is larger than the sum of its proper divisors (1214479).

23074721 is a wasteful number, since it uses less digits than its factorization.

23074721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214478.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 23074721 is about 4803.6154092517. The cubic root of 23074721 is about 284.6943311499.

The spelling of 23074721 in words is "twenty-three million, seventy-four thousand, seven hundred twenty-one".

Divisors: 1 19 1214459 23074721