11431887 has 16 divisors (see below), whose sum is σ = 15936480. Its totient is φ = 7280000.

The previous prime is 11431883. The next prime is 11431913. The reversal of 11431887 is 78813411.

It is a cyclic number.

It is not a de Polignac number, because 11431887 - 2² = 11431883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11431883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8137 + ... + 9437.

It is an arithmetic number, because the mean of its divisors is an integer number (996030).

Almost surely, 2^11431887 is an apocalyptic number.

11431887 is a deficient number, since it is larger than the sum of its proper divisors (4504593).

11431887 is a wasteful number, since it uses less digits than its factorization.

11431887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434.

The product of its digits is 5376, while the sum is 33.

The square root of 11431887 is about 3381.1073629804. The cubic root of 11431887 is about 225.2713565551.

The spelling of 11431887 in words is "eleven million, four hundred thirty-one thousand, eight hundred eighty-seven".