477991081 has 4 divisors (see below), whose sum is σ = 488161152. Its totient is φ = 467821012.

The previous prime is 477991069. The next prime is 477991121. The reversal of 477991081 is 180199774.

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 477991081 - 2²³ = 469602473 is a prime.

It is a super-2 number, since 2×477991081² = 456950947031097122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (477997081) 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, 5084965 + ... + 5085058.

It is an arithmetic number, because the mean of its divisors is an integer number (122040288).

Almost surely, 2^477991081 is an apocalyptic number.

It is an amenable number.

477991081 is a deficient number, since it is larger than the sum of its proper divisors (10170071).

477991081 is a wasteful number, since it uses less digits than its factorization.

477991081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10170070.

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 477991081 is about 21863.0071353417. The cubic root of 477991081 is about 781.8796880381.

The spelling of 477991081 in words is "four hundred seventy-seven million, nine hundred ninety-one thousand, eighty-one".