36997691 has 2 divisors, whose sum is σ = 36997692. Its totient is φ = 36997690.

The previous prime is 36997679. The next prime is 36997717. The reversal of 36997691 is 19679963.

It is a weak prime.

It is an emirp because it is prime and its reverse (19679963) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36997691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (36997091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18498845 + 18498846.

It is an arithmetic number, because the mean of its divisors is an integer number (18498846).

Almost surely, 2^36997691 is an apocalyptic number.

36997691 is a deficient number, since it is larger than the sum of its proper divisors (1).

36997691 is an equidigital number, since it uses as much as digits as its factorization.

36997691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 551124, while the sum is 50.

The square root of 36997691 is about 6082.5727287062. The cubic root of 36997691 is about 333.2152533985.

The spelling of 36997691 in words is "thirty-six million, nine hundred ninety-seven thousand, six hundred ninety-one".