36991499 has 4 divisors (see below), whose sum is σ = 38938440. Its totient is φ = 35044560.

The previous prime is 36991483. The next prime is 36991511. The reversal of 36991499 is 99419963.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99419963 = 3701 ⋅26863.

It is a cyclic number.

It is not a de Polignac number, because 36991499 - 2⁴ = 36991483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36991459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 973442 + ... + 973479.

It is an arithmetic number, because the mean of its divisors is an integer number (9734610).

Almost surely, 2^36991499 is an apocalyptic number.

36991499 is a deficient number, since it is larger than the sum of its proper divisors (1946941).

36991499 is a wasteful number, since it uses less digits than its factorization.

36991499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946940.

The product of its digits is 472392, while the sum is 50.

The square root of 36991499 is about 6082.0637122608. The cubic root of 36991499 is about 333.1966631937.

The spelling of 36991499 in words is "thirty-six million, nine hundred ninety-one thousand, four hundred ninety-nine".