477689081 has 4 divisors (see below), whose sum is σ = 481916532. Its totient is φ = 473461632.

The previous prime is 477689057. The next prime is 477689087. The reversal of 477689081 is 180986774.

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 237160000 + 240529081 = 15400^2 + 15509^2 .

It is a cyclic number.

It is not a de Polignac number, because 477689081 - 2²⁶ = 410580217 is a prime.

It is a super-2 number, since 2×477689081² = 456373716213249122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (477689087) 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, 2113556 + ... + 2113781.

It is an arithmetic number, because the mean of its divisors is an integer number (120479133).

Almost surely, 2^477689081 is an apocalyptic number.

It is an amenable number.

477689081 is a deficient number, since it is larger than the sum of its proper divisors (4227451).

477689081 is a wasteful number, since it uses less digits than its factorization.

477689081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227450.

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 477689081 is about 21856.0994003962. The cubic root of 477689081 is about 781.7149866298.

The spelling of 477689081 in words is "four hundred seventy-seven million, six hundred eighty-nine thousand, eighty-one".