479147257 has 4 divisors (see below), whose sum is σ = 480285796. Its totient is φ = 478008720.

The previous prime is 479147213. The next prime is 479147267. The reversal of 479147257 is 752741974.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13623481 + 465523776 = 3691^2 + 21576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-479147257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (479147267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 568638 + ... + 569479.

It is an arithmetic number, because the mean of its divisors is an integer number (120071449).

Almost surely, 2^479147257 is an apocalyptic number.

It is an amenable number.

479147257 is a deficient number, since it is larger than the sum of its proper divisors (1138539).

479147257 is a wasteful number, since it uses less digits than its factorization.

479147257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138538.

The product of its digits is 493920, while the sum is 46.

The square root of 479147257 is about 21889.4325417540. The cubic root of 479147257 is about 782.5095900590.

The spelling of 479147257 in words is "four hundred seventy-nine million, one hundred forty-seven thousand, two hundred fifty-seven".