620993634 has 8 divisors (see below), whose sum is σ = 1241987280. Its totient is φ = 206997876.

The previous prime is 620993599. The next prime is 620993669. The reversal of 620993634 is 436399026.

It is an interprime number because it is at equal distance from previous prime (620993599) and next prime (620993669).

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

620993634 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51749464 + ... + 51749475.

It is an arithmetic number, because the mean of its divisors is an integer number (155248410).

Almost surely, 2^620993634 is an apocalyptic number.

620993634 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

620993634 is a wasteful number, since it uses less digits than its factorization.

620993634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103498944.

The product of its (nonzero) digits is 209952, while the sum is 42.

The square root of 620993634 is about 24919.7438590368. The cubic root of 620993634 is about 853.1571786384.

The spelling of 620993634 in words is "six hundred twenty million, nine hundred ninety-three thousand, six hundred thirty-four".