620504393 has 4 divisors (see below), whose sum is σ = 637274820. Its totient is φ = 603733968.

The previous prime is 620504377. The next prime is 620504399. The reversal of 620504393 is 393405026.

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

It can be written as a sum of positive squares in 2 ways, for example, as 408161209 + 212343184 = 20203^2 + 14572^2 .

It is a cyclic number.

It is not a de Polignac number, because 620504393 - 2⁴ = 620504377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620504399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8385158 + ... + 8385231.

It is an arithmetic number, because the mean of its divisors is an integer number (159318705).

Almost surely, 2^620504393 is an apocalyptic number.

It is an amenable number.

620504393 is a deficient number, since it is larger than the sum of its proper divisors (16770427).

620504393 is a wasteful number, since it uses less digits than its factorization.

620504393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16770426.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 620504393 is about 24909.9255920205. The cubic root of 620504393 is about 852.9330705260.

The spelling of 620504393 in words is "six hundred twenty million, five hundred four thousand, three hundred ninety-three".