56409169 has 2 divisors, whose sum is σ = 56409170. Its totient is φ = 56409168.

The previous prime is 56409161. The next prime is 56409203. The reversal of 56409169 is 96190465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53114944 + 3294225 = 7288^2 + 1815^2 .

It is a cyclic number.

It is not a de Polignac number, because 56409169 - 2³ = 56409161 is a prime.

It is a super-2 number, since 2×56409169² = 6363988694541122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56409161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28204584 + 28204585.

It is an arithmetic number, because the mean of its divisors is an integer number (28204585).

Almost surely, 2^56409169 is an apocalyptic number.

It is an amenable number.

56409169 is a deficient number, since it is larger than the sum of its proper divisors (1).

56409169 is an equidigital number, since it uses as much as digits as its factorization.

56409169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 56409169 is about 7510.6037706698. The cubic root of 56409169 is about 383.5157764605.

The spelling of 56409169 in words is "fifty-six million, four hundred nine thousand, one hundred sixty-nine".