23643897 has 16 divisors (see below), whose sum is σ = 32287680. Its totient is φ = 15386112.

The previous prime is 23643887. The next prime is 23643899. The reversal of 23643897 is 79834632.

It is not a de Polignac number, because 23643897 - 2⁶ = 23643833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23643899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22929 + ... + 23937.

It is an arithmetic number, because the mean of its divisors is an integer number (2017980).

Almost surely, 2^23643897 is an apocalyptic number.

It is an amenable number.

23643897 is a deficient number, since it is larger than the sum of its proper divisors (8643783).

23643897 is a wasteful number, since it uses less digits than its factorization.

23643897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192.

The product of its digits is 217728, while the sum is 42.

The square root of 23643897 is about 4862.4990488431. The cubic root of 23643897 is about 287.0161621285.

The spelling of 23643897 in words is "twenty-three million, six hundred forty-three thousand, eight hundred ninety-seven".