123347531831 has 2 divisors, whose sum is σ = 123347531832. Its totient is φ = 123347531830.

The previous prime is 123347531819. The next prime is 123347531861. The reversal of 123347531831 is 138135743321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123347531831 - 2⁶ = 123347531767 is a prime.

It is a super-2 number, since 2×123347531831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123347531861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61673765915 + 61673765916.

It is an arithmetic number, because the mean of its divisors is an integer number (61673765916).

Almost surely, 2^123347531831 is an apocalyptic number.

123347531831 is a deficient number, since it is larger than the sum of its proper divisors (1).

123347531831 is an equidigital number, since it uses as much as digits as its factorization.

123347531831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The spelling of 123347531831 in words is "one hundred twenty-three billion, three hundred forty-seven million, five hundred thirty-one thousand, eight hundred thirty-one".