56109017 has 2 divisors, whose sum is σ = 56109018. Its totient is φ = 56109016.

The previous prime is 56109013. The next prime is 56109019. The reversal of 56109017 is 71090165.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53640976 + 2468041 = 7324^2 + 1571^2 .

It is a cyclic number.

It is not a de Polignac number, because 56109017 - 2² = 56109013 is a prime.

Together with 56109019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56109013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28054508 + 28054509.

It is an arithmetic number, because the mean of its divisors is an integer number (28054509).

Almost surely, 2^56109017 is an apocalyptic number.

It is an amenable number.

56109017 is a deficient number, since it is larger than the sum of its proper divisors (1).

56109017 is an equidigital number, since it uses as much as digits as its factorization.

56109017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 56109017 is about 7490.5952366951. The cubic root of 56109017 is about 382.8343399352.

The spelling of 56109017 in words is "fifty-six million, one hundred nine thousand, seventeen".