479538317861 has 2 divisors, whose sum is σ = 479538317862. Its totient is φ = 479538317860.

The previous prime is 479538317809. The next prime is 479538317887. The reversal of 479538317861 is 168713835974.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 447185100961 + 32353216900 = 668719^2 + 179870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-479538317861 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 479538317794 and 479538317803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (479538317801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239769158930 + 239769158931.

It is an arithmetic number, because the mean of its divisors is an integer number (239769158931).

Almost surely, 2^479538317861 is an apocalyptic number.

It is an amenable number.

479538317861 is a deficient number, since it is larger than the sum of its proper divisors (1).

479538317861 is an equidigital number, since it uses as much as digits as its factorization.

479538317861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30481920, while the sum is 62.

The spelling of 479538317861 in words is "four hundred seventy-nine billion, five hundred thirty-eight million, three hundred seventeen thousand, eight hundred sixty-one".