23551669 has 2 divisors, whose sum is σ = 23551670. Its totient is φ = 23551668.

The previous prime is 23551651. The next prime is 23551691. The reversal of 23551669 is 96615532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13972644 + 9579025 = 3738^2 + 3095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23551669 is a prime.

It is a super-2 number, since 2×23551669² = 1109362225371122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23551169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11775834 + 11775835.

It is an arithmetic number, because the mean of its divisors is an integer number (11775835).

Almost surely, 2^23551669 is an apocalyptic number.

It is an amenable number.

23551669 is a deficient number, since it is larger than the sum of its proper divisors (1).

23551669 is an equidigital number, since it uses as much as digits as its factorization.

23551669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 37.

The square root of 23551669 is about 4853.0061817393. The cubic root of 23551669 is about 286.6424868434.

The spelling of 23551669 in words is "twenty-three million, five hundred fifty-one thousand, six hundred sixty-nine".