621620007 has 8 divisors (see below), whose sum is σ = 829578480. Its totient is φ = 414037440.

The previous prime is 621620003. The next prime is 621620033. The reversal of 621620007 is 700026126.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 621620007 - 2² = 621620003 is a prime.

It is a super-2 number, since 2×621620007² = 772822866205360098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621620003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90094 + ... + 96747.

It is an arithmetic number, because the mean of its divisors is an integer number (103697310).

Almost surely, 2^621620007 is an apocalyptic number.

621620007 is a deficient number, since it is larger than the sum of its proper divisors (207958473).

621620007 is a wasteful number, since it uses less digits than its factorization.

621620007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187953.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 621620007 is about 24932.3084972090. The cubic root of 621620007 is about 853.4439314692.

The spelling of 621620007 in words is "six hundred twenty-one million, six hundred twenty thousand, seven".