36916991 has 4 divisors (see below), whose sum is σ = 37613592. Its totient is φ = 36220392.

The previous prime is 36916973. The next prime is 36916993. The reversal of 36916991 is 19961963.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36916991 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36916993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348221 + ... + 348326.

It is an arithmetic number, because the mean of its divisors is an integer number (9403398).

Almost surely, 2^36916991 is an apocalyptic number.

36916991 is a deficient number, since it is larger than the sum of its proper divisors (696601).

36916991 is an equidigital number, since it uses as much as digits as its factorization.

36916991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696600.

The product of its digits is 78732, while the sum is 44.

The square root of 36916991 is about 6075.9354012366. The cubic root of 36916991 is about 332.9728054217.

The spelling of 36916991 in words is "thirty-six million, nine hundred sixteen thousand, nine hundred ninety-one".