123400202200391 has 2 divisors, whose sum is σ = 123400202200392. Its totient is φ = 123400202200390.

The previous prime is 123400202200343. The next prime is 123400202200423. The reversal of 123400202200391 is 193002202004321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123400202200391 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123400202700391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61700101100195 + 61700101100196.

It is an arithmetic number, because the mean of its divisors is an integer number (61700101100196).

Almost surely, 2^{123400202200391} is an apocalyptic number.

123400202200391 is a deficient number, since it is larger than the sum of its proper divisors (1).

123400202200391 is an equidigital number, since it uses as much as digits as its factorization.

123400202200391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 123400202200391 in words is "one hundred twenty-three trillion, four hundred billion, two hundred two million, two hundred thousand, three hundred ninety-one".