479631661 has 4 divisors (see below), whose sum is σ = 479888800. Its totient is φ = 479374524.

The previous prime is 479631643. The next prime is 479631671. The reversal of 479631661 is 166136974.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 479631661 - 2⁷ = 479631533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (479631671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125751 + ... + 129508.

It is an arithmetic number, because the mean of its divisors is an integer number (119972200).

Almost surely, 2^479631661 is an apocalyptic number.

It is an amenable number.

479631661 is a deficient number, since it is larger than the sum of its proper divisors (257139).

479631661 is a wasteful number, since it uses less digits than its factorization.

479631661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257138.

The product of its digits is 163296, while the sum is 43.

The square root of 479631661 is about 21900.4945377953. The cubic root of 479631661 is about 782.7731994227.

The spelling of 479631661 in words is "four hundred seventy-nine million, six hundred thirty-one thousand, six hundred sixty-one".