11685391 has 4 divisors (see below), whose sum is σ = 11740984. Its totient is φ = 11629800.

The previous prime is 11685383. The next prime is 11685407. The reversal of 11685391 is 19358611.

11685391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11685391 - 2³ = 11685383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11685301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27480 + ... + 27901.

It is an arithmetic number, because the mean of its divisors is an integer number (2935246).

Almost surely, 2^11685391 is an apocalyptic number.

11685391 is a deficient number, since it is larger than the sum of its proper divisors (55593).

11685391 is an equidigital number, since it uses as much as digits as its factorization.

11685391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55592.

The product of its digits is 6480, while the sum is 34.

The square root of 11685391 is about 3418.3901181697. The cubic root of 11685391 is about 226.9243410002.

The spelling of 11685391 in words is "eleven million, six hundred eighty-five thousand, three hundred ninety-one".