123392397731 has 2 divisors, whose sum is σ = 123392397732. Its totient is φ = 123392397730.

The previous prime is 123392397719. The next prime is 123392397767. The reversal of 123392397731 is 137793293321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123392397731 - 2¹⁴ = 123392381347 is a prime.

It is a super-2 number, since 2×123392397731² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123392397731.

It is not a weakly prime, because it can be changed into another prime (123392397701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61696198865 + 61696198866.

It is an arithmetic number, because the mean of its divisors is an integer number (61696198866).

Almost surely, 2^123392397731 is an apocalyptic number.

123392397731 is a deficient number, since it is larger than the sum of its proper divisors (1).

123392397731 is an equidigital number, since it uses as much as digits as its factorization.

123392397731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1285956, while the sum is 50.

The spelling of 123392397731 in words is "one hundred twenty-three billion, three hundred ninety-two million, three hundred ninety-seven thousand, seven hundred thirty-one".