23887872017 has 2 divisors, whose sum is σ = 23887872018. Its totient is φ = 23887872016.

The previous prime is 23887871983. The next prime is 23887872049. The reversal of 23887872017 is 71027878832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21363914896 + 2523957121 = 146164^2 + 50239^2 .

It is a cyclic number.

It is not a de Polignac number, because 23887872017 - 2¹² = 23887867921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23887872017.

It is not a weakly prime, because it can be changed into another prime (23887872077) 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, 11943936008 + 11943936009.

It is an arithmetic number, because the mean of its divisors is an integer number (11943936009).

Almost surely, 2^23887872017 is an apocalyptic number.

It is an amenable number.

23887872017 is a deficient number, since it is larger than the sum of its proper divisors (1).

23887872017 is an equidigital number, since it uses as much as digits as its factorization.

23887872017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2107392, while the sum is 53.

The spelling of 23887872017 in words is "twenty-three billion, eight hundred eighty-seven million, eight hundred seventy-two thousand, seventeen".