479881649 has 4 divisors (see below), whose sum is σ = 516795636. Its totient is φ = 442967664.

The previous prime is 479881621. The next prime is 479881657. The reversal of 479881649 is 946188974.

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 180418624 + 299463025 = 13432^2 + 17305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-479881649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 479881594 and 479881603.

It is not an unprimeable number, because it can be changed into a prime (479881669) 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, 18456974 + ... + 18456999.

It is an arithmetic number, because the mean of its divisors is an integer number (129198909).

Almost surely, 2^479881649 is an apocalyptic number.

It is an amenable number.

479881649 is a deficient number, since it is larger than the sum of its proper divisors (36913987).

479881649 is a wasteful number, since it uses less digits than its factorization.

479881649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36913986.

The product of its digits is 3483648, while the sum is 56.

The square root of 479881649 is about 21906.2011540112. The cubic root of 479881649 is about 782.9091717636.

The spelling of 479881649 in words is "four hundred seventy-nine million, eight hundred eighty-one thousand, six hundred forty-nine".