23531765897 has 2 divisors, whose sum is σ = 23531765898. Its totient is φ = 23531765896.

The previous prime is 23531765893. The next prime is 23531765947. The reversal of 23531765897 is 79856713532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16141956601 + 7389809296 = 127051^2 + 85964^2 .

It is a cyclic number.

It is not a de Polignac number, because 23531765897 - 2² = 23531765893 is a prime.

It is not a weakly prime, because it can be changed into another prime (23531765893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11765882948 + 11765882949.

It is an arithmetic number, because the mean of its divisors is an integer number (11765882949).

Almost surely, 2^23531765897 is an apocalyptic number.

It is an amenable number.

23531765897 is a deficient number, since it is larger than the sum of its proper divisors (1).

23531765897 is an equidigital number, since it uses as much as digits as its factorization.

23531765897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9525600, while the sum is 56.

The spelling of 23531765897 in words is "twenty-three billion, five hundred thirty-one million, seven hundred sixty-five thousand, eight hundred ninety-seven".