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23000389 = 193119173
BaseRepresentation
bin101011110111…
…1010101000101
31121021112121021
41113233111011
521342003024
62140551141
7366333346
oct127572505
947245537
1023000389
1111a8a595
1278524b1
1349c3cc9
1430aa0cd
152044de4
hex15ef545

23000389 has 4 divisors (see below), whose sum is σ = 23119756. Its totient is φ = 22881024.

The previous prime is 23000377. The next prime is 23000401. The reversal of 23000389 is 98300032.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (23000377) and next prime (23000401).

It can be written as a sum of positive squares in 2 ways, for example, as 14250625 + 8749764 = 3775^2 + 2958^2 .

It is a cyclic number.

It is not a de Polignac number, because 23000389 - 27 = 23000261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23000309) 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, 59394 + ... + 59779.

It is an arithmetic number, because the mean of its divisors is an integer number (5779939).

Almost surely, 223000389 is an apocalyptic number.

It is an amenable number.

23000389 is a deficient number, since it is larger than the sum of its proper divisors (119367).

23000389 is a wasteful number, since it uses less digits than its factorization.

23000389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119366.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 23000389 is about 4795.8720791948. The cubic root of 23000389 is about 284.3883012576.

The spelling of 23000389 in words is "twenty-three million, three hundred eighty-nine", and thus it is an aban number.

Divisors: 1 193 119173 23000389