477808981 has 8 divisors (see below), whose sum is σ = 514734080. Its totient is φ = 440908272.

The previous prime is 477808973. The next prime is 477808999. The reversal of 477808981 is 189808774.

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 477808981 - 2³ = 477808973 is a prime.

It is a super-2 number, since 2×477808981² = 456602844648516722, 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 (477808951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68200 + ... + 74878.

It is an arithmetic number, because the mean of its divisors is an integer number (64341760).

Almost surely, 2^477808981 is an apocalyptic number.

It is an amenable number.

477808981 is a deficient number, since it is larger than the sum of its proper divisors (36925099).

477808981 is a wasteful number, since it uses less digits than its factorization.

477808981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12195.

The product of its (nonzero) digits is 903168, while the sum is 52.

The square root of 477808981 is about 21858.8421697033. The cubic root of 477808981 is about 781.7803846679.

The spelling of 477808981 in words is "four hundred seventy-seven million, eight hundred eight thousand, nine hundred eighty-one".