620870389 has 4 divisors (see below), whose sum is σ = 626673024. Its totient is φ = 615067756.

The previous prime is 620870381. The next prime is 620870443. The reversal of 620870389 is 983078026.

620870389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 620870389 - 2³ = 620870381 is a prime.

It is a super-2 number, since 2×620870389² = 770960079874022642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620870381) 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, 2901157 + ... + 2901370.

It is an arithmetic number, because the mean of its divisors is an integer number (156668256).

Almost surely, 2^620870389 is an apocalyptic number.

It is an amenable number.

620870389 is a deficient number, since it is larger than the sum of its proper divisors (5802635).

620870389 is a wasteful number, since it uses less digits than its factorization.

620870389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5802634.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 620870389 is about 24917.2708979134. The cubic root of 620870389 is about 853.1007345207.

The spelling of 620870389 in words is "six hundred twenty million, eight hundred seventy thousand, three hundred eighty-nine".