23689813 has 4 divisors (see below), whose sum is σ = 27074080. Its totient is φ = 20305548.

The previous prime is 23689769. The next prime is 23689819. The reversal of 23689813 is 31898632.

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 23689813 - 2²¹ = 21592661 is a prime.

It is a super-2 number, since 2×23689813² = 1122414479949938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23689819) 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, 1692123 + ... + 1692136.

It is an arithmetic number, because the mean of its divisors is an integer number (6768520).

Almost surely, 2^23689813 is an apocalyptic number.

It is an amenable number.

23689813 is a deficient number, since it is larger than the sum of its proper divisors (3384267).

23689813 is an equidigital number, since it uses as much as digits as its factorization.

23689813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3384266.

The product of its digits is 62208, while the sum is 40.

The square root of 23689813 is about 4867.2181993414. The cubic root of 23689813 is about 287.2018353053.

The spelling of 23689813 in words is "twenty-three million, six hundred eighty-nine thousand, eight hundred thirteen".