620889635 has 4 divisors (see below), whose sum is σ = 745067568. Its totient is φ = 496711704.

The previous prime is 620889613. The next prime is 620889653. The reversal of 620889635 is 536988026.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 620889635 - 2²⁴ = 604112419 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 620889635.

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, 62088959 + ... + 62088968.

It is an arithmetic number, because the mean of its divisors is an integer number (186266892).

Almost surely, 2^620889635 is an apocalyptic number.

620889635 is a deficient number, since it is larger than the sum of its proper divisors (124177933).

620889635 is a wasteful number, since it uses less digits than its factorization.

620889635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124177932.

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 620889635 is about 24917.6570929130. The cubic root of 620889635 is about 853.1095493541.

The spelling of 620889635 in words is "six hundred twenty million, eight hundred eighty-nine thousand, six hundred thirty-five".