123171626423513 has 2 divisors, whose sum is σ = 123171626423514. Its totient is φ = 123171626423512.

The previous prime is 123171626423501. The next prime is 123171626423609. The reversal of 123171626423513 is 315324626171321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77600648029129 + 45570978394384 = 8809123^2 + 6750628^2 .

It is a cyclic number.

It is not a de Polignac number, because 123171626423513 - 2⁶ = 123171626423449 is a prime.

It is a super-2 number, since 2×123171626423513² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123171626425513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61585813211756 + 61585813211757.

It is an arithmetic number, because the mean of its divisors is an integer number (61585813211757).

Almost surely, 2^{123171626423513} is an apocalyptic number.

It is an amenable number.

123171626423513 is a deficient number, since it is larger than the sum of its proper divisors (1).

123171626423513 is an equidigital number, since it uses as much as digits as its factorization.

123171626423513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 47.

The spelling of 123171626423513 in words is "one hundred twenty-three trillion, one hundred seventy-one billion, six hundred twenty-six million, four hundred twenty-three thousand, five hundred thirteen".