477908989 has 4 divisors (see below), whose sum is σ = 493325440. Its totient is φ = 462492540.

The previous prime is 477908987. The next prime is 477909011. The reversal of 477908989 is 989809774.

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 477908989 - 2¹ = 477908987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (477908987) 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, 7708179 + ... + 7708240.

It is an arithmetic number, because the mean of its divisors is an integer number (123331360).

Almost surely, 2^477908989 is an apocalyptic number.

It is an amenable number.

477908989 is a deficient number, since it is larger than the sum of its proper divisors (15416451).

477908989 is a wasteful number, since it uses less digits than its factorization.

477908989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15416450.

The product of its (nonzero) digits is 9144576, while the sum is 61.

The square root of 477908989 is about 21861.1296368692. The cubic root of 477908989 is about 781.8349244817.

The spelling of 477908989 in words is "four hundred seventy-seven million, nine hundred eight thousand, nine hundred eighty-nine".