11912691 has 16 divisors (see below), whose sum is σ = 18215424. Its totient is φ = 6783744.

The previous prime is 11912687. The next prime is 11912723. The reversal of 11912691 is 19621911.

It is not a de Polignac number, because 11912691 - 2² = 11912687 is a prime.

It is a super-2 number, since 2×11912691² = 283824413722962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11912191) 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, 6610 + ... + 8216.

It is an arithmetic number, because the mean of its divisors is an integer number (1138464).

Almost surely, 2^11912691 is an apocalyptic number.

11912691 is a deficient number, since it is larger than the sum of its proper divisors (6302733).

11912691 is a wasteful number, since it uses less digits than its factorization.

11912691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970.

The product of its digits is 972, while the sum is 30.

The square root of 11912691 is about 3451.4766405120. The cubic root of 11912691 is about 228.3862527930.

The spelling of 11912691 in words is "eleven million, nine hundred twelve thousand, six hundred ninety-one".