23149681 has 2 divisors, whose sum is σ = 23149682. Its totient is φ = 23149680.

The previous prime is 23149673. The next prime is 23149691. The reversal of 23149681 is 18694132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20205025 + 2944656 = 4495^2 + 1716^2 .

It is a cyclic number.

It is not a de Polignac number, because 23149681 - 2³ = 23149673 is a prime.

It is a super-2 number, since 2×23149681² = 1071815460803522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23149691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11574840 + 11574841.

It is an arithmetic number, because the mean of its divisors is an integer number (11574841).

Almost surely, 2^23149681 is an apocalyptic number.

It is an amenable number.

23149681 is a deficient number, since it is larger than the sum of its proper divisors (1).

23149681 is an equidigital number, since it uses as much as digits as its factorization.

23149681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 23149681 is about 4811.4115392471. The cubic root of 23149681 is about 285.0022817094.

The spelling of 23149681 in words is "twenty-three million, one hundred forty-nine thousand, six hundred eighty-one".