11846991 has 32 divisors (see below), whose sum is σ = 18063360. Its totient is φ = 6854400.

The previous prime is 11846987. The next prime is 11846999. The reversal of 11846991 is 19964811.

It is not a de Polignac number, because 11846991 - 2² = 11846987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11846999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49450 + ... + 49688.

It is an arithmetic number, because the mean of its divisors is an integer number (564480).

Almost surely, 2^11846991 is an apocalyptic number.

11846991 is a deficient number, since it is larger than the sum of its proper divisors (6216369).

11846991 is a wasteful number, since it uses less digits than its factorization.

11846991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327.

The product of its digits is 15552, while the sum is 39.

The square root of 11846991 is about 3441.9458159593. The cubic root of 11846991 is about 227.9656188539.

The spelling of 11846991 in words is "eleven million, eight hundred forty-six thousand, nine hundred ninety-one".