479297639 has 4 divisors (see below), whose sum is σ = 479991960. Its totient is φ = 478603320.

The previous prime is 479297627. The next prime is 479297647. The reversal of 479297639 is 936792974.

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

It is a cyclic number.

It is not a de Polignac number, because 479297639 - 2²⁴ = 462520423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (479297939) 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, 346124 + ... + 347505.

It is an arithmetic number, because the mean of its divisors is an integer number (119997990).

Almost surely, 2^479297639 is an apocalyptic number.

479297639 is a deficient number, since it is larger than the sum of its proper divisors (694321).

479297639 is an equidigital number, since it uses as much as digits as its factorization.

479297639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694320.

The product of its digits is 5143824, while the sum is 56.

The square root of 479297639 is about 21892.8673087835. The cubic root of 479297639 is about 782.5914459301.

The spelling of 479297639 in words is "four hundred seventy-nine million, two hundred ninety-seven thousand, six hundred thirty-nine".