123144134203957 has 2 divisors, whose sum is σ = 123144134203958. Its totient is φ = 123144134203956.

The previous prime is 123144134203889. The next prime is 123144134204011. The reversal of 123144134203957 is 759302431441321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62495333349201 + 60648800854756 = 7905399^2 + 7787734^2 .

It is a cyclic number.

It is not a de Polignac number, because 123144134203957 - 2³¹ = 123141986720309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123144134203957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123144134203157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61572067101978 + 61572067101979.

It is an arithmetic number, because the mean of its divisors is an integer number (61572067101979).

Almost surely, 2^{123144134203957} is an apocalyptic number.

It is an amenable number.

123144134203957 is a deficient number, since it is larger than the sum of its proper divisors (1).

123144134203957 is an equidigital number, since it uses as much as digits as its factorization.

123144134203957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 123144134203957 in words is "one hundred twenty-three trillion, one hundred forty-four billion, one hundred thirty-four million, two hundred three thousand, nine hundred fifty-seven".