123203012155697 has 2 divisors, whose sum is σ = 123203012155698. Its totient is φ = 123203012155696.

The previous prime is 123203012155609. The next prime is 123203012155709. The reversal of 123203012155697 is 796551210302321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74618222817856 + 48584789337841 = 8638184^2 + 6970279^2 .

It is a cyclic number.

It is not a de Polignac number, because 123203012155697 - 2²⁴ = 123202995378481 is a prime.

It is not a weakly prime, because it can be changed into another prime (123203012157697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61601506077848 + 61601506077849.

It is an arithmetic number, because the mean of its divisors is an integer number (61601506077849).

Almost surely, 2^{123203012155697} is an apocalyptic number.

It is an amenable number.

123203012155697 is a deficient number, since it is larger than the sum of its proper divisors (1).

123203012155697 is an equidigital number, since it uses as much as digits as its factorization.

123203012155697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 47.

The spelling of 123203012155697 in words is "one hundred twenty-three trillion, two hundred three billion, twelve million, one hundred fifty-five thousand, six hundred ninety-seven".