11691375 has 16 divisors (see below), whose sum is σ = 19455072. Its totient is φ = 6235200.

The previous prime is 11691373. The next prime is 11691377. The reversal of 11691375 is 57319611.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11691373) and next prime (11691377).

It is not a de Polignac number, because 11691375 - 2¹ = 11691373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11691373) 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, 15214 + ... + 15963.

It is an arithmetic number, because the mean of its divisors is an integer number (1215942).

Almost surely, 2^11691375 is an apocalyptic number.

11691375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11691375 is a deficient number, since it is larger than the sum of its proper divisors (7763697).

11691375 is an equidigital number, since it uses as much as digits as its factorization.

11691375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31195 (or 31185 counting only the distinct ones).

The product of its digits is 5670, while the sum is 33.

The square root of 11691375 is about 3419.2652719554. The cubic root of 11691375 is about 226.9630698007.

The spelling of 11691375 in words is "eleven million, six hundred ninety-one thousand, three hundred seventy-five".