11387831 has 8 divisors (see below), whose sum is σ = 14015904. Its totient is φ = 9010080.

The previous prime is 11387797. The next prime is 11387837. The reversal of 11387831 is 13878311.

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

It is a cyclic number.

It is not a de Polignac number, because 11387831 - 2¹⁴ = 11371447 is a prime.

It is a super-2 number, since 2×11387831² = 259365389769122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11387837) 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, 62480 + ... + 62661.

It is an arithmetic number, because the mean of its divisors is an integer number (1751988).

Almost surely, 2^11387831 is an apocalyptic number.

11387831 is a deficient number, since it is larger than the sum of its proper divisors (2628073).

11387831 is a wasteful number, since it uses less digits than its factorization.

11387831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125161.

The product of its digits is 4032, while the sum is 32.

The square root of 11387831 is about 3374.5860486880. The cubic root of 11387831 is about 224.9816017878.

The spelling of 11387831 in words is "eleven million, three hundred eighty-seven thousand, eight hundred thirty-one".