36569891 has 2 divisors, whose sum is σ = 36569892. Its totient is φ = 36569890.

The previous prime is 36569867. The next prime is 36569893. The reversal of 36569891 is 19896563.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 36569891 - 2¹⁴ = 36553507 is a prime.

It is a Sophie Germain prime.

Together with 36569893, 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 (36569893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18284945 + 18284946.

It is an arithmetic number, because the mean of its divisors is an integer number (18284946).

Almost surely, 2^36569891 is an apocalyptic number.

36569891 is a deficient number, since it is larger than the sum of its proper divisors (1).

36569891 is an equidigital number, since it uses as much as digits as its factorization.

36569891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 47.

The square root of 36569891 is about 6047.3044408232. The cubic root of 36569891 is about 331.9259614985.

The spelling of 36569891 in words is "thirty-six million, five hundred sixty-nine thousand, eight hundred ninety-one".