479778881 has 2 divisors, whose sum is σ = 479778882. Its totient is φ = 479778880.

The previous prime is 479778863. The next prime is 479778917. The reversal of 479778881 is 188877974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 467640625 + 12138256 = 21625^2 + 3484^2 .

It is a cyclic number.

It is not a de Polignac number, because 479778881 - 2²⁶ = 412670017 is a prime.

It is a super-2 number, since 2×479778881² = 460375549307224322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 479778881.

It is not a weakly prime, because it can be changed into another prime (479778281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239889440 + 239889441.

It is an arithmetic number, because the mean of its divisors is an integer number (239889441).

Almost surely, 2^479778881 is an apocalyptic number.

It is an amenable number.

479778881 is a deficient number, since it is larger than the sum of its proper divisors (1).

479778881 is an equidigital number, since it uses as much as digits as its factorization.

479778881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6322176, while the sum is 59.

The square root of 479778881 is about 21903.8553912319. The cubic root of 479778881 is about 782.8532803759.

The spelling of 479778881 in words is "four hundred seventy-nine million, seven hundred seventy-eight thousand, eight hundred eighty-one".