36388409 has 2 divisors, whose sum is σ = 36388410. Its totient is φ = 36388408.

The previous prime is 36388397. The next prime is 36388459. The reversal of 36388409 is 90488363.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25806400 + 10582009 = 5080^2 + 3253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36388409 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (36388459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18194204 + 18194205.

It is an arithmetic number, because the mean of its divisors is an integer number (18194205).

Almost surely, 2^36388409 is an apocalyptic number.

It is an amenable number.

36388409 is a deficient number, since it is larger than the sum of its proper divisors (1).

36388409 is an equidigital number, since it uses as much as digits as its factorization.

36388409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 36388409 is about 6032.2805803444. The cubic root of 36388409 is about 331.3759779998.

The spelling of 36388409 in words is "thirty-six million, three hundred eighty-eight thousand, four hundred nine".