479831621 has 2 divisors, whose sum is σ = 479831622. Its totient is φ = 479831620.

The previous prime is 479831617. The next prime is 479831623. The reversal of 479831621 is 126138974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 313679521 + 166152100 = 17711^2 + 12890^2 .

It is a cyclic number.

It is not a de Polignac number, because 479831621 - 2² = 479831617 is a prime.

It is a super-2 number, since 2×479831621² = 460476769022975282, which contains 22 as substring.

Together with 479831623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (479831623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239915810 + 239915811.

It is an arithmetic number, because the mean of its divisors is an integer number (239915811).

Almost surely, 2^479831621 is an apocalyptic number.

It is an amenable number.

479831621 is a deficient number, since it is larger than the sum of its proper divisors (1).

479831621 is an equidigital number, since it uses as much as digits as its factorization.

479831621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 479831621 is about 21905.0592557975. The cubic root of 479831621 is about 782.8819645405.

The spelling of 479831621 in words is "four hundred seventy-nine million, eight hundred thirty-one thousand, six hundred twenty-one".