477990769 has 3 divisors (see below), whose sum is σ = 478012633. Its totient is φ = 477968906.

The previous prime is 477990763. The next prime is 477990781. The reversal of 477990769 is 967099774.

The square root of 477990769 is 21863.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 477990769 - 2⁹ = 477990257 is a prime.

It is a super-2 number, since 2×477990769² = 456950350498422722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (477990763) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 10932 + ... + 32794.

Almost surely, 2^477990769 is an apocalyptic number.

477990769 is the 21863-rd square number.

477990769 is the 10932-nd centered octagonal number.

It is an amenable number.

477990769 is a deficient number, since it is larger than the sum of its proper divisors (21864).

477990769 is an frugal number, since it uses more digits than its factorization.

477990769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43726 (or 21863 counting only the distinct ones).

The product of its (nonzero) digits is 6001128, while the sum is 58.

The cubic root of 477990769 is about 781.8795179188.

The spelling of 477990769 in words is "four hundred seventy-seven million, nine hundred ninety thousand, seven hundred sixty-nine".