621083985 has 16 divisors (see below), whose sum is σ = 994560000. Its totient is φ = 330969600.

The previous prime is 621083971. The next prime is 621083999. The reversal of 621083985 is 589380126.

It is an interprime number because it is at equal distance from previous prime (621083971) and next prime (621083999).

It is not a de Polignac number, because 621083985 - 2⁶ = 621083921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2160 + ... + 35310.

It is an arithmetic number, because the mean of its divisors is an integer number (62160000).

Almost surely, 2^621083985 is an apocalyptic number.

It is an amenable number.

621083985 is a deficient number, since it is larger than the sum of its proper divisors (373476015).

621083985 is a wasteful number, since it uses less digits than its factorization.

621083985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34408.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 621083985 is about 24921.5566327627. The cubic root of 621083985 is about 853.1985531184.

The spelling of 621083985 in words is "six hundred twenty-one million, eighty-three thousand, nine hundred eighty-five".