11996691 has 16 divisors (see below), whose sum is σ = 18912000. Its totient is φ = 6618528.

The previous prime is 11996689. The next prime is 11996693. The reversal of 11996691 is 19669911.

11996691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11996689) and next prime (11996693).

It is not a de Polignac number, because 11996691 - 2¹ = 11996689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11996693) 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, 9241 + ... + 10458.

It is an arithmetic number, because the mean of its divisors is an integer number (1182000).

Almost surely, 2^11996691 is an apocalyptic number.

11996691 is a deficient number, since it is larger than the sum of its proper divisors (6915309).

11996691 is a wasteful number, since it uses less digits than its factorization.

11996691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19738.

The product of its digits is 26244, while the sum is 42.

The square root of 11996691 is about 3463.6239691976. The cubic root of 11996691 is about 228.9218029126.

The spelling of 11996691 in words is "eleven million, nine hundred ninety-six thousand, six hundred ninety-one".