40636913 has 4 divisors (see below), whose sum is σ = 40729920. Its totient is φ = 40543908.

The previous prime is 40636903. The next prime is 40636927. The reversal of 40636913 is 31963604.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 40636913 - 2⁸ = 40636657 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 40636913.

It is not an unprimeable number, because it can be changed into a prime (40636903) 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, 45845 + ... + 46722.

It is an arithmetic number, because the mean of its divisors is an integer number (10182480).

Almost surely, 2^40636913 is an apocalyptic number.

It is an amenable number.

40636913 is a deficient number, since it is larger than the sum of its proper divisors (93007).

40636913 is an equidigital number, since it uses as much as digits as its factorization.

40636913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93006.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 40636913 is about 6374.7088560969. The cubic root of 40636913 is about 343.8008159366.

The spelling of 40636913 in words is "forty million, six hundred thirty-six thousand, nine hundred thirteen".