123974064461609 has 2 divisors, whose sum is σ = 123974064461610. Its totient is φ = 123974064461608.

The previous prime is 123974064461551. The next prime is 123974064461617. The reversal of 123974064461609 is 906164460479321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101501534591209 + 22472529870400 = 10074797^2 + 4740520^2 .

It is a cyclic number.

It is not a de Polignac number, because 123974064461609 - 2²⁴ = 123974047684393 is a prime.

It is not a weakly prime, because it can be changed into another prime (123974064461809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61987032230804 + 61987032230805.

It is an arithmetic number, because the mean of its divisors is an integer number (61987032230805).

Almost surely, 2^{123974064461609} is an apocalyptic number.

It is an amenable number.

123974064461609 is a deficient number, since it is larger than the sum of its proper divisors (1).

123974064461609 is an equidigital number, since it uses as much as digits as its factorization.

123974064461609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47029248, while the sum is 62.

The spelling of 123974064461609 in words is "one hundred twenty-three trillion, nine hundred seventy-four billion, sixty-four million, four hundred sixty-one thousand, six hundred nine".