479639381 has 8 divisors (see below), whose sum is σ = 534346680. Its totient is φ = 427476672.

The previous prime is 479639359. The next prime is 479639383. The reversal of 479639381 is 183936974.

It can be written as a sum of positive squares in 4 ways, for example, as 5880625 + 473758756 = 2425^2 + 21766^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 479639381 - 2⁶ = 479639317 is a prime.

It is a super-2 number, since 2×479639381² = 460107871612126322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (479639383) 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 7 ways as a sum of consecutive naturals, for example, 635750 + ... + 636503.

It is an arithmetic number, because the mean of its divisors is an integer number (66793335).

Almost surely, 2^479639381 is an apocalyptic number.

It is an amenable number.

479639381 is a deficient number, since it is larger than the sum of its proper divisors (54707299).

479639381 is a wasteful number, since it uses less digits than its factorization.

479639381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272295.

The product of its digits is 979776, while the sum is 50.

The square root of 479639381 is about 21900.6707888138. The cubic root of 479639381 is about 782.7773991571. Note that the first 3 decimals are identical.

The spelling of 479639381 in words is "four hundred seventy-nine million, six hundred thirty-nine thousand, three hundred eighty-one".