36631913 has 4 divisors (see below), whose sum is σ = 36719760. Its totient is φ = 36544068.

The previous prime is 36631909. The next prime is 36631937. The reversal of 36631913 is 31913663.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31913663 = 31 ⋅1029473.

It is a cyclic number.

It is not a de Polignac number, because 36631913 - 2² = 36631909 is a prime.

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 36631913.

It is not an unprimeable number, because it can be changed into a prime (36636913) 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, 43295 + ... + 44132.

It is an arithmetic number, because the mean of its divisors is an integer number (9179940).

Almost surely, 2^36631913 is an apocalyptic number.

It is an amenable number.

36631913 is a deficient number, since it is larger than the sum of its proper divisors (87847).

36631913 is an equidigital number, since it uses as much as digits as its factorization.

36631913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87846.

The product of its digits is 8748, while the sum is 32.

The square root of 36631913 is about 6052.4303383021. The cubic root of 36631913 is about 332.1135027072.

The spelling of 36631913 in words is "thirty-six million, six hundred thirty-one thousand, nine hundred thirteen".