477987161 has 4 divisors (see below), whose sum is σ = 503144400. Its totient is φ = 452829924.

The previous prime is 477987157. The next prime is 477987197. The reversal of 477987161 is 161789774.

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 477987161 - 2² = 477987157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (477987131) 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, 12578591 + ... + 12578628.

It is an arithmetic number, because the mean of its divisors is an integer number (125786100).

Almost surely, 2^477987161 is an apocalyptic number.

It is an amenable number.

477987161 is a deficient number, since it is larger than the sum of its proper divisors (25157239).

477987161 is a wasteful number, since it uses less digits than its factorization.

477987161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25157238.

The product of its digits is 592704, while the sum is 50.

The square root of 477987161 is about 21862.9174860081. The cubic root of 477987161 is about 781.8775506365.

The spelling of 477987161 in words is "four hundred seventy-seven million, nine hundred eighty-seven thousand, one hundred sixty-one".