23507881 has 2 divisors, whose sum is σ = 23507882. Its totient is φ = 23507880.

The previous prime is 23507873. The next prime is 23507917. The reversal of 23507881 is 18870532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23474025 + 33856 = 4845^2 + 184^2 .

It is a cyclic number.

It is not a de Polignac number, because 23507881 - 2³ = 23507873 is a prime.

It is a super-2 number, since 2×23507881² = 1105240938220322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23507681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11753940 + 11753941.

It is an arithmetic number, because the mean of its divisors is an integer number (11753941).

Almost surely, 2^23507881 is an apocalyptic number.

It is an amenable number.

23507881 is a deficient number, since it is larger than the sum of its proper divisors (1).

23507881 is an equidigital number, since it uses as much as digits as its factorization.

23507881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 23507881 is about 4848.4926523611. The cubic root of 23507881 is about 286.4647317415.

The spelling of 23507881 in words is "twenty-three million, five hundred seven thousand, eight hundred eighty-one".