123454406052391 has 2 divisors, whose sum is σ = 123454406052392. Its totient is φ = 123454406052390.

The previous prime is 123454406052359. The next prime is 123454406052503. The reversal of 123454406052391 is 193250604454321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123454406052391 - 2⁵ = 123454406052359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123454406052301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61727203026195 + 61727203026196.

It is an arithmetic number, because the mean of its divisors is an integer number (61727203026196).

Almost surely, 2^{123454406052391} is an apocalyptic number.

123454406052391 is a deficient number, since it is larger than the sum of its proper divisors (1).

123454406052391 is an equidigital number, since it uses as much as digits as its factorization.

123454406052391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 123454406052391 in words is "one hundred twenty-three trillion, four hundred fifty-four billion, four hundred six million, fifty-two thousand, three hundred ninety-one".