620681963 has 12 divisors (see below), whose sum is σ = 686072520. Its totient is φ = 561084480.

The previous prime is 620681959. The next prime is 620681977. The reversal of 620681963 is 369186026.

It is not a de Polignac number, because 620681963 - 2² = 620681959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 620681963.

It is not an unprimeable number, because it can be changed into a prime (620681363) 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, 7331 + ... + 35987.

It is an arithmetic number, because the mean of its divisors is an integer number (57172710).

Almost surely, 2^620681963 is an apocalyptic number.

620681963 is a deficient number, since it is larger than the sum of its proper divisors (65390557).

620681963 is a wasteful number, since it uses less digits than its factorization.

620681963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28858 (or 28847 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 620681963 is about 24913.4895789410. The cubic root of 620681963 is about 853.0144241699.

The spelling of 620681963 in words is "six hundred twenty million, six hundred eighty-one thousand, nine hundred sixty-three".