479340509 has 2 divisors, whose sum is σ = 479340510. Its totient is φ = 479340508.

The previous prime is 479340503. The next prime is 479340559. The reversal of 479340509 is 905043974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 458088409 + 21252100 = 21403^2 + 4610^2 .

It is a cyclic number.

It is not a de Polignac number, because 479340509 - 2¹² = 479336413 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (479340503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239670254 + 239670255.

It is an arithmetic number, because the mean of its divisors is an integer number (239670255).

Almost surely, 2^479340509 is an apocalyptic number.

It is an amenable number.

479340509 is a deficient number, since it is larger than the sum of its proper divisors (1).

479340509 is an equidigital number, since it uses as much as digits as its factorization.

479340509 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 41.

The square root of 479340509 is about 21893.8463728967. The cubic root of 479340509 is about 782.6147777754.

The spelling of 479340509 in words is "four hundred seventy-nine million, three hundred forty thousand, five hundred nine".