620706779 has 16 divisors (see below), whose sum is σ = 784774656. Its totient is φ = 476851200.

The previous prime is 620706767. The next prime is 620706803. The reversal of 620706779 is 977607026.

It is not a de Polignac number, because 620706779 - 2⁸ = 620706523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620706379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51302 + ... + 62235.

It is an arithmetic number, because the mean of its divisors is an integer number (49048416).

Almost surely, 2^620706779 is an apocalyptic number.

620706779 is a deficient number, since it is larger than the sum of its proper divisors (164067877).

620706779 is a wasteful number, since it uses less digits than its factorization.

620706779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113626.

The product of its (nonzero) digits is 222264, while the sum is 44.

The square root of 620706779 is about 24913.9876174008. The cubic root of 620706779 is about 853.0257923773.

The spelling of 620706779 in words is "six hundred twenty million, seven hundred six thousand, seven hundred seventy-nine".