11899691 has 16 divisors (see below), whose sum is σ = 12840960. Its totient is φ = 11007360.

The previous prime is 11899687. The next prime is 11899709. The reversal of 11899691 is 19699811.

It is a cyclic number.

It is not a de Polignac number, because 11899691 - 2² = 11899687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11899621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105251 + ... + 105363.

It is an arithmetic number, because the mean of its divisors is an integer number (802560).

Almost surely, 2^11899691 is an apocalyptic number.

11899691 is a deficient number, since it is larger than the sum of its proper divisors (941269).

11899691 is a wasteful number, since it uses less digits than its factorization.

11899691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266.

The product of its digits is 34992, while the sum is 44.

The square root of 11899691 is about 3449.5928745288. The cubic root of 11899691 is about 228.3031452918.

The spelling of 11899691 in words is "eleven million, eight hundred ninety-nine thousand, six hundred ninety-one".