23205897 has 72 divisors (see below), whose sum is σ = 42251040. Its totient is φ = 12130560.

The previous prime is 23205883. The next prime is 23205907. The reversal of 23205897 is 79850232.

It is a happy number.

It is not a de Polignac number, because 23205897 - 2⁴ = 23205881 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (23205817) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 317853 + ... + 317925.

It is an arithmetic number, because the mean of its divisors is an integer number (586820).

Almost surely, 2^23205897 is an apocalyptic number.

23205897 is the 2409-th decagonal number.

It is an amenable number.

23205897 is a deficient number, since it is larger than the sum of its proper divisors (19045143).

23205897 is a wasteful number, since it uses less digits than its factorization.

23205897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 23205897 is about 4817.2499416161. The cubic root of 23205897 is about 285.2327922562.

The spelling of 23205897 in words is "twenty-three million, two hundred five thousand, eight hundred ninety-seven".