11691867 has 24 divisors (see below), whose sum is σ = 17704960. Its totient is φ = 6850800.

The previous prime is 11691863. The next prime is 11691871. The reversal of 11691867 is 76819611.

It is an interprime number because it is at equal distance from previous prime (11691863) and next prime (11691871).

It is not a de Polignac number, because 11691867 - 2² = 11691863 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11691863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10734 + ... + 11772.

Almost surely, 2^11691867 is an apocalyptic number.

11691867 is a deficient number, since it is larger than the sum of its proper divisors (6013093).

11691867 is a wasteful number, since it uses less digits than its factorization.

11691867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095 (or 1084 counting only the distinct ones).

The product of its digits is 18144, while the sum is 39.

The square root of 11691867 is about 3419.3372164792. The cubic root of 11691867 is about 226.9662534657.

The spelling of 11691867 in words is "eleven million, six hundred ninety-one thousand, eight hundred sixty-seven".