479091839 has 2 divisors, whose sum is σ = 479091840. Its totient is φ = 479091838.

The previous prime is 479091797. The next prime is 479091871. The reversal of 479091839 is 938190974.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-479091839 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (479991839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239545919 + 239545920.

It is an arithmetic number, because the mean of its divisors is an integer number (239545920).

Almost surely, 2^479091839 is an apocalyptic number.

479091839 is a deficient number, since it is larger than the sum of its proper divisors (1).

479091839 is an equidigital number, since it uses as much as digits as its factorization.

479091839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 479091839 is about 21888.1666431887. The cubic root of 479091839 is about 782.4794206362.

The spelling of 479091839 in words is "four hundred seventy-nine million, ninety-one thousand, eight hundred thirty-nine".