11639999 has 12 divisors (see below), whose sum is σ = 13645800. Its totient is φ = 9899568.

The previous prime is 11639987. The next prime is 11640007. The reversal of 11639999 is 99993611.

It is a de Polignac number, because none of the positive numbers 2^k-11639999 is a prime.

11639999 is a modest number, since divided by 9999 gives 1163 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11639099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5957 + ... + 7665.

It is an arithmetic number, because the mean of its divisors is an integer number (1137150).

Almost surely, 2^11639999 is an apocalyptic number.

11639999 is a deficient number, since it is larger than the sum of its proper divisors (2005801).

11639999 is a wasteful number, since it uses less digits than its factorization.

11639999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862 (or 1855 counting only the distinct ones).

The product of its digits is 118098, while the sum is 47.

The square root of 11639999 is about 3411.7442752938. The cubic root of 11639999 is about 226.6301298760.

The spelling of 11639999 in words is "eleven million, six hundred thirty-nine thousand, nine hundred ninety-nine".