23027981 has 4 divisors (see below), whose sum is σ = 24240000. Its totient is φ = 21815964.

The previous prime is 23027957. The next prime is 23028007. The reversal of 23027981 is 18972032.

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 23027981 - 2²² = 18833677 is a prime.

It is a super-2 number, since 2×23027981² = 1060575817872722, 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 (23027951) 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, 605981 + ... + 606018.

It is an arithmetic number, because the mean of its divisors is an integer number (6060000).

Almost surely, 2^23027981 is an apocalyptic number.

It is an amenable number.

23027981 is a deficient number, since it is larger than the sum of its proper divisors (1212019).

23027981 is a wasteful number, since it uses less digits than its factorization.

23027981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212018.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 23027981 is about 4798.7478575145. The cubic root of 23027981 is about 284.5019762383.

The spelling of 23027981 in words is "twenty-three million, twenty-seven thousand, nine hundred eighty-one".