36991323 has 10 divisors (see below), whose sum is σ = 55258764. Its totient is φ = 24660828.

The previous prime is 36991321. The next prime is 36991343. The reversal of 36991323 is 32319963.

It is a happy number.

36991323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 36991323 - 2¹ = 36991321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (36991321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 228261 + ... + 228422.

Almost surely, 2^36991323 is an apocalyptic number.

36991323 is a deficient number, since it is larger than the sum of its proper divisors (18267441).

36991323 is an equidigital number, since it uses as much as digits as its factorization.

36991323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456695 (or 456686 counting only the distinct ones).

The product of its digits is 26244, while the sum is 36.

The square root of 36991323 is about 6082.0492434705. The cubic root of 36991323 is about 333.1961347596.

The spelling of 36991323 in words is "thirty-six million, nine hundred ninety-one thousand, three hundred twenty-three".