620463631 has 4 divisors (see below), whose sum is σ = 620566264. Its totient is φ = 620361000.

The previous prime is 620463629. The next prime is 620463653. The reversal of 620463631 is 136364026.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 620463631 - 2¹ = 620463629 is a prime.

It is a super-2 number, since 2×620463631² = 769950234787408322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 620463593 and 620463602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620463131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41640 + ... + 54541.

It is an arithmetic number, because the mean of its divisors is an integer number (155141566).

Almost surely, 2^620463631 is an apocalyptic number.

620463631 is a deficient number, since it is larger than the sum of its proper divisors (102633).

620463631 is an equidigital number, since it uses as much as digits as its factorization.

620463631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102632.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 620463631 is about 24909.1073906714. The cubic root of 620463631 is about 852.9143932373.

The spelling of 620463631 in words is "six hundred twenty million, four hundred sixty-three thousand, six hundred thirty-one".