470721161 has 2 divisors, whose sum is σ = 470721162. Its totient is φ = 470721160.

The previous prime is 470721157. The next prime is 470721169. The reversal of 470721161 is 161127074.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359292025 + 111429136 = 18955^2 + 10556^2 .

It is a cyclic number.

It is not a de Polignac number, because 470721161 - 2² = 470721157 is a prime.

It is a super-2 number, since 2×470721161² = 443156822826375842, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (470721169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235360580 + 235360581.

It is an arithmetic number, because the mean of its divisors is an integer number (235360581).

Almost surely, 2^470721161 is an apocalyptic number.

It is an amenable number.

470721161 is a deficient number, since it is larger than the sum of its proper divisors (1).

470721161 is an equidigital number, since it uses as much as digits as its factorization.

470721161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 470721161 is about 21696.1093516787. The cubic root of 470721161 is about 777.8954669748.

The spelling of 470721161 in words is "four hundred seventy million, seven hundred twenty-one thousand, one hundred sixty-one".