621713601 has 12 divisors (see below), whose sum is σ = 898677780. Its totient is φ = 414177120.

The previous prime is 621713597. The next prime is 621713633. The reversal of 621713601 is 106317126.

621713601 is a `hidden beast` number, since 621 + 7 + 1 + 36 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 261662976 + 360050625 = 16176^2 + 18975^2 .

It is not a de Polignac number, because 621713601 - 2² = 621713597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (621713101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11310 + ... + 37031.

It is an arithmetic number, because the mean of its divisors is an integer number (74889815).

Almost surely, 2^621713601 is an apocalyptic number.

It is an amenable number.

621713601 is a deficient number, since it is larger than the sum of its proper divisors (276964179).

621713601 is a wasteful number, since it uses less digits than its factorization.

621713601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49776 (or 49773 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 621713601 is about 24934.1853887389. The cubic root of 621713601 is about 853.4867621492.

The spelling of 621713601 in words is "six hundred twenty-one million, seven hundred thirteen thousand, six hundred one".