620430931 has 8 divisors (see below), whose sum is σ = 641529728. Its totient is φ = 599400000.

The previous prime is 620430919. The next prime is 620430947. The reversal of 620430931 is 139034026.

620430931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 620430931 - 2¹¹ = 620428883 is a prime.

It is a super-2 number, since 2×620430931² = 769869080283053522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 620430931.

It is not an unprimeable number, because it can be changed into a prime (620430131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1981 + ... + 35281.

It is an arithmetic number, because the mean of its divisors is an integer number (80191216).

Almost surely, 2^620430931 is an apocalyptic number.

620430931 is a deficient number, since it is larger than the sum of its proper divisors (21098797).

620430931 is a wasteful number, since it uses less digits than its factorization.

620430931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33933.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 620430931 is about 24908.4509955959. The cubic root of 620430931 is about 852.8994093933.

Adding to 620430931 its reverse (139034026), we get a palindrome (759464957).

The spelling of 620430931 in words is "six hundred twenty million, four hundred thirty thousand, nine hundred thirty-one".