11491887 has 8 divisors (see below), whose sum is σ = 16715520. Its totient is φ = 6964760.

The previous prime is 11491877. The next prime is 11491889. The reversal of 11491887 is 78819411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11491887 - 2⁷ = 11491759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11491889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174087 + ... + 174152.

It is an arithmetic number, because the mean of its divisors is an integer number (2089440).

Almost surely, 2^11491887 is an apocalyptic number.

11491887 is a deficient number, since it is larger than the sum of its proper divisors (5223633).

11491887 is a wasteful number, since it uses less digits than its factorization.

11491887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348253.

The product of its digits is 16128, while the sum is 39.

The square root of 11491887 is about 3389.9685839252. The cubic root of 11491887 is about 225.6647796027.

The spelling of 11491887 in words is "eleven million, four hundred ninety-one thousand, eight hundred eighty-seven".