620394579 has 16 divisors (see below), whose sum is σ = 1050403840. Its totient is φ = 354511080.

The previous prime is 620394569. The next prime is 620394587. The reversal of 620394579 is 975493026.

It is a happy number.

It is not a de Polignac number, because 620394579 - 2⁴ = 620394563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620394529) 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, 1641067 + ... + 1641444.

It is an arithmetic number, because the mean of its divisors is an integer number (65650240).

Almost surely, 2^620394579 is an apocalyptic number.

620394579 is a deficient number, since it is larger than the sum of its proper divisors (430009261).

620394579 is a wasteful number, since it uses less digits than its factorization.

620394579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3282527 (or 3282521 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 620394579 is about 24907.7212727299. The cubic root of 620394579 is about 852.8827515064.

The spelling of 620394579 in words is "six hundred twenty million, three hundred ninety-four thousand, five hundred seventy-nine".