123433854159389 has 2 divisors, whose sum is σ = 123433854159390. Its totient is φ = 123433854159388.

The previous prime is 123433854159311. The next prime is 123433854159409. The reversal of 123433854159389 is 983951458334321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65075408026489 + 58358446132900 = 8066933^2 + 7639270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123433854159389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123433854159089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61716927079694 + 61716927079695.

It is an arithmetic number, because the mean of its divisors is an integer number (61716927079695).

Almost surely, 2^{123433854159389} is an apocalyptic number.

It is an amenable number.

123433854159389 is a deficient number, since it is larger than the sum of its proper divisors (1).

123433854159389 is an equidigital number, since it uses as much as digits as its factorization.

123433854159389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 335923200, while the sum is 68.

The spelling of 123433854159389 in words is "one hundred twenty-three trillion, four hundred thirty-three billion, eight hundred fifty-four million, one hundred fifty-nine thousand, three hundred eighty-nine".