23690531 has 4 divisors (see below), whose sum is σ = 23710200. Its totient is φ = 23670864.

The previous prime is 23690521. The next prime is 23690543. The reversal of 23690531 is 13509632.

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

It is a cyclic number.

It is not a de Polignac number, because 23690531 - 2⁶ = 23690467 is a prime.

It is a super-2 number, since 2×23690531² = 1122482518123922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23690494 and 23690503.

It is not an unprimeable number, because it can be changed into a prime (23690521) 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, 7901 + ... + 10478.

It is an arithmetic number, because the mean of its divisors is an integer number (5927550).

Almost surely, 2^23690531 is an apocalyptic number.

23690531 is a deficient number, since it is larger than the sum of its proper divisors (19669).

23690531 is a wasteful number, since it uses less digits than its factorization.

23690531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19668.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 23690531 is about 4867.2919575468. The cubic root of 23690531 is about 287.2047368174.

The spelling of 23690531 in words is "twenty-three million, six hundred ninety thousand, five hundred thirty-one".