56904161 has 2 divisors, whose sum is σ = 56904162. Its totient is φ = 56904160.

The previous prime is 56904149. The next prime is 56904163. The reversal of 56904161 is 16140965.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39929761 + 16974400 = 6319^2 + 4120^2 .

It is a cyclic number.

It is not a de Polignac number, because 56904161 - 2⁶ = 56904097 is a prime.

It is a super-2 number, since 2×56904161² = 6476167078227842, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 56904163, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (56904163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28452080 + 28452081.

It is an arithmetic number, because the mean of its divisors is an integer number (28452081).

Almost surely, 2^56904161 is an apocalyptic number.

It is an amenable number.

56904161 is a deficient number, since it is larger than the sum of its proper divisors (1).

56904161 is an equidigital number, since it uses as much as digits as its factorization.

56904161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 56904161 is about 7543.4846722188. The cubic root of 56904161 is about 384.6342982668.

The spelling of 56904161 in words is "fifty-six million, nine hundred four thousand, one hundred sixty-one".