23897881 has 4 divisors (see below), whose sum is σ = 27311872. Its totient is φ = 20483892.

The previous prime is 23897857. The next prime is 23897899. The reversal of 23897881 is 18879832.

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 23897881 - 2¹³ = 23889689 is a prime.

It is a super-2 number, since 2×23897881² = 1142217432580322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23897821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1706985 + ... + 1706998.

It is an arithmetic number, because the mean of its divisors is an integer number (6827968).

Almost surely, 2^23897881 is an apocalyptic number.

It is an amenable number.

23897881 is a deficient number, since it is larger than the sum of its proper divisors (3413991).

23897881 is an equidigital number, since it uses as much as digits as its factorization.

23897881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3413990.

The product of its digits is 193536, while the sum is 46.

The square root of 23897881 is about 4888.5458983219. The cubic root of 23897881 is about 288.0402183096.

The spelling of 23897881 in words is "twenty-three million, eight hundred ninety-seven thousand, eight hundred eighty-one".