621807601 has 4 divisors (see below), whose sum is σ = 627844672. Its totient is φ = 615770532.

The previous prime is 621807583. The next prime is 621807619. The reversal of 621807601 is 106708126.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (621807583) and next prime (621807619).

It is a cyclic number.

It is not a de Polignac number, because 621807601 - 2⁵ = 621807569 is a prime.

It is a super-2 number, since 2×621807601² = 773289385322750402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621807671) 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, 3018381 + ... + 3018586.

It is an arithmetic number, because the mean of its divisors is an integer number (156961168).

Almost surely, 2^621807601 is an apocalyptic number.

It is an amenable number.

621807601 is a deficient number, since it is larger than the sum of its proper divisors (6037071).

621807601 is a wasteful number, since it uses less digits than its factorization.

621807601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6037070.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 621807601 is about 24936.0702798175. The cubic root of 621807601 is about 853.5297742974.

The spelling of 621807601 in words is "six hundred twenty-one million, eight hundred seven thousand, six hundred one".