479492989 has 4 divisors (see below), whose sum is σ = 496027260. Its totient is φ = 462958720.

The previous prime is 479492971. The next prime is 479493017. The reversal of 479492989 is 989294974.

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 185096025 + 294396964 = 13605^2 + 17158^2 .

It is a cyclic number.

It is not a de Polignac number, because 479492989 - 2⁷ = 479492861 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 (479492969) 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, 8267092 + ... + 8267149.

It is an arithmetic number, because the mean of its divisors is an integer number (124006815).

Almost surely, 2^479492989 is an apocalyptic number.

It is an amenable number.

479492989 is a deficient number, since it is larger than the sum of its proper divisors (16534271).

479492989 is a wasteful number, since it uses less digits than its factorization.

479492989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16534270.

The product of its digits is 11757312, while the sum is 61.

The square root of 479492989 is about 21897.3283530206. The cubic root of 479492989 is about 782.6977532023.

The spelling of 479492989 in words is "four hundred seventy-nine million, four hundred ninety-two thousand, nine hundred eighty-nine".