123453040391 has 2 divisors, whose sum is σ = 123453040392. Its totient is φ = 123453040390.

The previous prime is 123453040259. The next prime is 123453040423. The reversal of 123453040391 is 193040354321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123453040391 - 2¹⁴ = 123453024007 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 (123453040591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61726520195 + 61726520196.

It is an arithmetic number, because the mean of its divisors is an integer number (61726520196).

Almost surely, 2^123453040391 is an apocalyptic number.

123453040391 is a deficient number, since it is larger than the sum of its proper divisors (1).

123453040391 is an equidigital number, since it uses as much as digits as its factorization.

123453040391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 123453040391 in words is "one hundred twenty-three billion, four hundred fifty-three million, forty thousand, three hundred ninety-one".