23651869 has 2 divisors, whose sum is σ = 23651870. Its totient is φ = 23651868.

The previous prime is 23651863. The next prime is 23651897. The reversal of 23651869 is 96815632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12180100 + 11471769 = 3490^2 + 3387^2 .

It is a cyclic number.

It is not a de Polignac number, because 23651869 - 2¹³ = 23643677 is a prime.

It is a super-2 number, since 2×23651869² = 1118821814386322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23651863) 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 as a sum of consecutive naturals, namely, 11825934 + 11825935.

It is an arithmetic number, because the mean of its divisors is an integer number (11825935).

Almost surely, 2^23651869 is an apocalyptic number.

It is an amenable number.

23651869 is a deficient number, since it is larger than the sum of its proper divisors (1).

23651869 is an equidigital number, since it uses as much as digits as its factorization.

23651869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The square root of 23651869 is about 4863.3187228476. The cubic root of 23651869 is about 287.0484161986.

The spelling of 23651869 in words is "twenty-three million, six hundred fifty-one thousand, eight hundred sixty-nine".