11639969 has 4 divisors (see below), whose sum is σ = 12698160. Its totient is φ = 10581780.

The previous prime is 11639963. The next prime is 11639987. The reversal of 11639969 is 96993611.

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 de Polignac number, because none of the positive numbers 2^k-11639969 is a prime.

It is a super-2 number, since 2×11639969² = 270977756641922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11639963) 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 3 ways as a sum of consecutive naturals, for example, 529079 + ... + 529100.

It is an arithmetic number, because the mean of its divisors is an integer number (3174540).

Almost surely, 2^11639969 is an apocalyptic number.

It is an amenable number.

11639969 is a deficient number, since it is larger than the sum of its proper divisors (1058191).

11639969 is a wasteful number, since it uses less digits than its factorization.

11639969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058190.

The product of its digits is 78732, while the sum is 44.

The square root of 11639969 is about 3411.7398787129. The cubic root of 11639969 is about 226.6299351764.

The spelling of 11639969 in words is "eleven million, six hundred thirty-nine thousand, nine hundred sixty-nine".