102023780157917 has 2 divisors, whose sum is σ = 102023780157918. Its totient is φ = 102023780157916.

The previous prime is 102023780157847. The next prime is 102023780157979. The reversal of 102023780157917 is 719751087320201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101781343078276 + 242437079641 = 10088674^2 + 492379^2 .

It is a cyclic number.

It is not a de Polignac number, because 102023780157917 - 2³² = 102019485190621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102023780157997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51011890078958 + 51011890078959.

It is an arithmetic number, because the mean of its divisors is an integer number (51011890078959).

Almost surely, 2^{102023780157917} is an apocalyptic number.

It is an amenable number.

102023780157917 is a deficient number, since it is larger than the sum of its proper divisors (1).

102023780157917 is an equidigital number, since it uses as much as digits as its factorization.

102023780157917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1481760, while the sum is 53.

The spelling of 102023780157917 in words is "one hundred two trillion, twenty-three billion, seven hundred eighty million, one hundred fifty-seven thousand, nine hundred seventeen".