56109091 has 2 divisors, whose sum is σ = 56109092. Its totient is φ = 56109090.

The previous prime is 56109077. The next prime is 56109107. The reversal of 56109091 is 19090165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56109091 - 2¹¹ = 56107043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56209091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28054545 + 28054546.

It is an arithmetic number, because the mean of its divisors is an integer number (28054546).

Almost surely, 2^56109091 is an apocalyptic number.

56109091 is a deficient number, since it is larger than the sum of its proper divisors (1).

56109091 is an equidigital number, since it uses as much as digits as its factorization.

56109091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 56109091 is about 7490.6001762209. The cubic root of 56109091 is about 382.8345082369.

The spelling of 56109091 in words is "fifty-six million, one hundred nine thousand, ninety-one".