36991649 has 8 divisors (see below), whose sum is σ = 38480640. Its totient is φ = 35521200.

The previous prime is 36991637. The next prime is 36991667. The reversal of 36991649 is 94619963.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 36991649 - 2⁸ = 36991393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36991049) 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 7 ways as a sum of consecutive naturals, for example, 494 + ... + 8615.

It is an arithmetic number, because the mean of its divisors is an integer number (4810080).

Almost surely, 2^36991649 is an apocalyptic number.

It is an amenable number.

36991649 is a deficient number, since it is larger than the sum of its proper divisors (1488991).

36991649 is a wasteful number, since it uses less digits than its factorization.

36991649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9271.

The product of its digits is 314928, while the sum is 47.

The square root of 36991649 is about 6082.0760435891. The cubic root of 36991649 is about 333.1971135623.

The spelling of 36991649 in words is "thirty-six million, nine hundred ninety-one thousand, six hundred forty-nine".