621407163 has 24 divisors (see below), whose sum is σ = 911791888. Its totient is φ = 374216256.

The previous prime is 621407161. The next prime is 621407191. The reversal of 621407163 is 361704126.

It is not a de Polignac number, because 621407163 - 2¹ = 621407161 is a prime.

It is a super-2 number, since 2×621407163² = 772293724455417138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621407163.

It is not an unprimeable number, because it can be changed into a prime (621407161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82545 + ... + 89757.

Almost surely, 2^621407163 is an apocalyptic number.

621407163 is a deficient number, since it is larger than the sum of its proper divisors (290384725).

621407163 is a wasteful number, since it uses less digits than its factorization.

621407163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7323 (or 7276 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 621407163 is about 24928.0396942880. The cubic root of 621407163 is about 853.3465133496.

The spelling of 621407163 in words is "six hundred twenty-one million, four hundred seven thousand, one hundred sixty-three".