479215861 has 2 divisors, whose sum is σ = 479215862. Its totient is φ = 479215860.

The previous prime is 479215859. The next prime is 479215883. The reversal of 479215861 is 168512974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287946961 + 191268900 = 16969^2 + 13830^2 .

It is a cyclic number.

It is not a de Polignac number, because 479215861 - 2¹ = 479215859 is a prime.

Together with 479215859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (479215801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239607930 + 239607931.

It is an arithmetic number, because the mean of its divisors is an integer number (239607931).

Almost surely, 2^479215861 is an apocalyptic number.

It is an amenable number.

479215861 is a deficient number, since it is larger than the sum of its proper divisors (1).

479215861 is an equidigital number, since it uses as much as digits as its factorization.

479215861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 479215861 is about 21890.9995431913. Note that the first 3 decimals coincide. The cubic root of 479215861 is about 782.5469346854.

The spelling of 479215861 in words is "four hundred seventy-nine million, two hundred fifteen thousand, eight hundred sixty-one".