123888887957 has 2 divisors, whose sum is σ = 123888887958. Its totient is φ = 123888887956.

The previous prime is 123888887939. The next prime is 123888888001. The reversal of 123888887957 is 759788888321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83378872516 + 40510015441 = 288754^2 + 201271^2 .

It is a cyclic number.

It is not a de Polignac number, because 123888887957 - 2⁸ = 123888887701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123888883957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61944443978 + 61944443979.

It is an arithmetic number, because the mean of its divisors is an integer number (61944443979).

Almost surely, 2^123888887957 is an apocalyptic number.

It is an amenable number.

123888887957 is a deficient number, since it is larger than the sum of its proper divisors (1).

123888887957 is an equidigital number, since it uses as much as digits as its factorization.

123888887957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 433520640, while the sum is 74.

The spelling of 123888887957 in words is "one hundred twenty-three billion, eight hundred eighty-eight million, eight hundred eighty-seven thousand, nine hundred fifty-seven".