620479641 has 4 divisors (see below), whose sum is σ = 827306192. Its totient is φ = 413653092.

The previous prime is 620479631. The next prime is 620479661. The reversal of 620479641 is 146974026.

It is a happy number.

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 not a de Polignac number, because 620479641 - 2¹⁸ = 620217497 is a prime.

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 620479641.

It is not an unprimeable number, because it can be changed into a prime (620479631) 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, 103413271 + ... + 103413276.

It is an arithmetic number, because the mean of its divisors is an integer number (206826548).

Almost surely, 2^620479641 is an apocalyptic number.

It is an amenable number.

620479641 is a deficient number, since it is larger than the sum of its proper divisors (206826551).

620479641 is a wasteful number, since it uses less digits than its factorization.

620479641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206826550.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 620479641 is about 24909.4287569988. The cubic root of 620479641 is about 852.9217291720.

The spelling of 620479641 in words is "six hundred twenty million, four hundred seventy-nine thousand, six hundred forty-one".