472905161 has 4 divisors (see below), whose sum is σ = 473725332. Its totient is φ = 472084992.

The previous prime is 472905157. The next prime is 472905163. The reversal of 472905161 is 161509274.

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 401401225 + 71503936 = 20035^2 + 8456^2 .

It is a cyclic number.

It is not a de Polignac number, because 472905161 - 2² = 472905157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (472905163) 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, 409220 + ... + 410373.

It is an arithmetic number, because the mean of its divisors is an integer number (118431333).

Almost surely, 2^472905161 is an apocalyptic number.

It is an amenable number.

472905161 is a deficient number, since it is larger than the sum of its proper divisors (820171).

472905161 is an equidigital number, since it uses as much as digits as its factorization.

472905161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820170.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 472905161 is about 21746.3827106947. The cubic root of 472905161 is about 779.0966756021.

The spelling of 472905161 in words is "four hundred seventy-two million, nine hundred five thousand, one hundred sixty-one".