11387131 has 8 divisors (see below), whose sum is σ = 13316864. Its totient is φ = 9533160.

The previous prime is 11387087. The next prime is 11387143. The reversal of 11387131 is 13178311.

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

It is not a de Polignac number, because 11387131 - 2⁷ = 11387003 is a prime.

It is a super-2 number, since 2×11387131² = 259333504822322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11387096 and 11387105.

It is not an unprimeable number, because it can be changed into a prime (11387171) 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, 18615 + ... + 19216.

It is an arithmetic number, because the mean of its divisors is an integer number (1664608).

Almost surely, 2^11387131 is an apocalyptic number.

11387131 is a deficient number, since it is larger than the sum of its proper divisors (1929733).

11387131 is an equidigital number, since it uses as much as digits as its factorization.

11387131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37881.

The product of its digits is 504, while the sum is 25.

The square root of 11387131 is about 3374.4823306694. The cubic root of 11387131 is about 224.9769918860.

The spelling of 11387131 in words is "eleven million, three hundred eighty-seven thousand, one hundred thirty-one".