123131613635293 has 2 divisors, whose sum is σ = 123131613635294. Its totient is φ = 123131613635292.

The previous prime is 123131613635279. The next prime is 123131613635369. The reversal of 123131613635293 is 392536316131321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82805595658564 + 40326017976729 = 9099758^2 + 6350277^2 .

It is an emirp because it is prime and its reverse (392536316131321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123131613635293 is a prime.

It is a super-2 number, since 2×123131613635293² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123131613636293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61565806817646 + 61565806817647.

It is an arithmetic number, because the mean of its divisors is an integer number (61565806817647).

Almost surely, 2^{123131613635293} is an apocalyptic number.

It is an amenable number.

123131613635293 is a deficient number, since it is larger than the sum of its proper divisors (1).

123131613635293 is an equidigital number, since it uses as much as digits as its factorization.

123131613635293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 49.

The spelling of 123131613635293 in words is "one hundred twenty-three trillion, one hundred thirty-one billion, six hundred thirteen million, six hundred thirty-five thousand, two hundred ninety-three".