620254631 has 2 divisors, whose sum is σ = 620254632. Its totient is φ = 620254630.

The previous prime is 620254597. The next prime is 620254633. The reversal of 620254631 is 136452026.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620254631 - 2²² = 616060327 is a prime.

It is a super-2 number, since 2×620254631² = 769431614553892322, which contains 22 as substring.

Together with 620254633, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 620254594 and 620254603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620254633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310127315 + 310127316.

It is an arithmetic number, because the mean of its divisors is an integer number (310127316).

Almost surely, 2^620254631 is an apocalyptic number.

620254631 is a deficient number, since it is larger than the sum of its proper divisors (1).

620254631 is an equidigital number, since it uses as much as digits as its factorization.

620254631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 620254631 is about 24904.9117846259. The cubic root of 620254631 is about 852.8186158657.

The spelling of 620254631 in words is "six hundred twenty million, two hundred fifty-four thousand, six hundred thirty-one".