623901431 has 2 divisors, whose sum is σ = 623901432. Its totient is φ = 623901430.

The previous prime is 623901409. The next prime is 623901451. The reversal of 623901431 is 134109326.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623901431 is a prime.

It is a super-2 number, since 2×623901431² = 778505991207695522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 623901394 and 623901403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623901451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311950715 + 311950716.

It is an arithmetic number, because the mean of its divisors is an integer number (311950716).

Almost surely, 2^623901431 is an apocalyptic number.

623901431 is a deficient number, since it is larger than the sum of its proper divisors (1).

623901431 is an equidigital number, since it uses as much as digits as its factorization.

623901431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 623901431 is about 24978.0189566747. The cubic root of 623901431 is about 854.4867391311.

The spelling of 623901431 in words is "six hundred twenty-three million, nine hundred one thousand, four hundred thirty-one".