479261509 has 2 divisors, whose sum is σ = 479261510. Its totient is φ = 479261508.

The previous prime is 479261477. The next prime is 479261513. The reversal of 479261509 is 905162974.

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., 476548900 + 2712609 = 21830^2 + 1647^2 .

It is a cyclic number.

It is not a de Polignac number, because 479261509 - 2⁵ = 479261477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (479261579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239630754 + 239630755.

It is an arithmetic number, because the mean of its divisors is an integer number (239630755).

Almost surely, 2^479261509 is an apocalyptic number.

It is an amenable number.

479261509 is a deficient number, since it is larger than the sum of its proper divisors (1).

479261509 is an equidigital number, since it uses as much as digits as its factorization.

479261509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 479261509 is about 21892.0421386402. The cubic root of 479261509 is about 782.5717812255.

The spelling of 479261509 in words is "four hundred seventy-nine million, two hundred sixty-one thousand, five hundred nine".