36491939 has 4 divisors (see below), whose sum is σ = 39809400. Its totient is φ = 33174480.

The previous prime is 36491933. The next prime is 36491963. The reversal of 36491939 is 93919463.

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

It is a cyclic number.

It is not a de Polignac number, because 36491939 - 2⁸ = 36491683 is a prime.

It is a super-2 number, since 2×36491939² = 2663323223959442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 36491939.

It is not an unprimeable number, because it can be changed into a prime (36491933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1658714 + ... + 1658735.

It is an arithmetic number, because the mean of its divisors is an integer number (9952350).

Almost surely, 2^36491939 is an apocalyptic number.

36491939 is a deficient number, since it is larger than the sum of its proper divisors (3317461).

36491939 is a wasteful number, since it uses less digits than its factorization.

36491939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3317460.

The product of its digits is 157464, while the sum is 44.

The square root of 36491939 is about 6040.8558168524. The cubic root of 36491939 is about 331.6899504149.

The spelling of 36491939 in words is "thirty-six million, four hundred ninety-one thousand, nine hundred thirty-nine".