11691427 has 16 divisors (see below), whose sum is σ = 13658112. Its totient is φ = 9889920.

The previous prime is 11691419. The next prime is 11691439. The reversal of 11691427 is 72419611.

11691427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11691427 - 2³ = 11691419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11691467) 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, 18958 + ... + 19564.

It is an arithmetic number, because the mean of its divisors is an integer number (853632).

Almost surely, 2^11691427 is an apocalyptic number.

11691427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

11691427 is a deficient number, since it is larger than the sum of its proper divisors (1966685).

11691427 is a wasteful number, since it uses less digits than its factorization.

11691427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738.

The product of its digits is 3024, while the sum is 31.

The square root of 11691427 is about 3419.2728759197. The cubic root of 11691427 is about 226.9634062898.

The spelling of 11691427 in words is "eleven million, six hundred ninety-one thousand, four hundred twenty-seven".