620830809 has 12 divisors (see below), whose sum is σ = 897000000. Its totient is φ = 413774424.

The previous prime is 620830759. The next prime is 620830813. The reversal of 620830809 is 908038026.

It is not a de Polignac number, because 620830809 - 2¹³ = 620822617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620830109) 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, 38092 + ... + 51890.

It is an arithmetic number, because the mean of its divisors is an integer number (74750000).

Almost surely, 2^620830809 is an apocalyptic number.

It is an amenable number.

620830809 is a deficient number, since it is larger than the sum of its proper divisors (276169191).

620830809 is a wasteful number, since it uses less digits than its factorization.

620830809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18804 (or 18801 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 620830809 is about 24916.4766570236. The cubic root of 620830809 is about 853.0826059681.

The spelling of 620830809 in words is "six hundred twenty million, eight hundred thirty thousand, eight hundred nine".