477891921 has 8 divisors (see below), whose sum is σ = 686203840. Its totient is φ = 294087312.

The previous prime is 477891919. The next prime is 477891943. The reversal of 477891921 is 129198774.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 477891921 - 2¹ = 477891919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (477891901) 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, 6126781 + ... + 6126858.

It is an arithmetic number, because the mean of its divisors is an integer number (85775480).

Almost surely, 2^477891921 is an apocalyptic number.

It is an amenable number.

477891921 is a deficient number, since it is larger than the sum of its proper divisors (208311919).

477891921 is a wasteful number, since it uses less digits than its factorization.

477891921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12253655.

The product of its digits is 254016, while the sum is 48.

The square root of 477891921 is about 21860.7392601440. The cubic root of 477891921 is about 781.8256169094.

The spelling of 477891921 in words is "four hundred seventy-seven million, eight hundred ninety-one thousand, nine hundred twenty-one".