11864691 has 16 divisors (see below), whose sum is σ = 18612000. Its totient is φ = 7444224.

The previous prime is 11864687. The next prime is 11864717. The reversal of 11864691 is 19646811.

It is a happy number.

11864691 is a `hidden beast` number, since 1 + 1 + 8 + 646 + 9 + 1 = 666.

11864691 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11864691 - 2² = 11864687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11864641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12466 + ... + 13383.

It is an arithmetic number, because the mean of its divisors is an integer number (1163250).

Almost surely, 2^11864691 is an apocalyptic number.

11864691 is a deficient number, since it is larger than the sum of its proper divisors (6747309).

11864691 is a wasteful number, since it uses less digits than its factorization.

11864691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25875 (or 25869 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 11864691 is about 3444.5160763161. The cubic root of 11864691 is about 228.0790930581.

The spelling of 11864691 in words is "eleven million, eight hundred sixty-four thousand, six hundred ninety-one".