479807921 has 2 divisors, whose sum is σ = 479807922. Its totient is φ = 479807920.

The previous prime is 479807879. The next prime is 479807927. The reversal of 479807921 is 129708974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 427042225 + 52765696 = 20665^2 + 7264^2 .

It is a cyclic number.

It is not a de Polignac number, because 479807921 - 2¹⁰ = 479806897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (479807927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239903960 + 239903961.

It is an arithmetic number, because the mean of its divisors is an integer number (239903961).

Almost surely, 2^479807921 is an apocalyptic number.

It is an amenable number.

479807921 is a deficient number, since it is larger than the sum of its proper divisors (1).

479807921 is an equidigital number, since it uses as much as digits as its factorization.

479807921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 479807921 is about 21904.5182782000. The cubic root of 479807921 is about 782.8690748745.

The spelling of 479807921 in words is "four hundred seventy-nine million, eight hundred seven thousand, nine hundred twenty-one".