623061631 has 2 divisors, whose sum is σ = 623061632. Its totient is φ = 623061630.

The previous prime is 623061557. The next prime is 623061641. The reversal of 623061631 is 136160326.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 623061631 - 2⁹ = 623061119 is a prime.

It is a super-2 number, since 2×623061631² = 776411592048760322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 623061631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623061641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311530815 + 311530816.

It is an arithmetic number, because the mean of its divisors is an integer number (311530816).

Almost surely, 2^623061631 is an apocalyptic number.

623061631 is a deficient number, since it is larger than the sum of its proper divisors (1).

623061631 is an equidigital number, since it uses as much as digits as its factorization.

623061631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 623061631 is about 24961.2025151033. The cubic root of 623061631 is about 854.1031741735.

The spelling of 623061631 in words is "six hundred twenty-three million, sixty-one thousand, six hundred thirty-one".