10931987 has 12 divisors (see below), whose sum is σ = 12110448. Its totient is φ = 9860400.

The previous prime is 10931957. The next prime is 10931989. The reversal of 10931987 is 78913901.

It is not a de Polignac number, because 10931987 - 2¹⁰ = 10930963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10931987.

It is not an unprimeable number, because it can be changed into a prime (10931989) 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 11 ways as a sum of consecutive naturals, for example, 19937 + ... + 20477.

It is an arithmetic number, because the mean of its divisors is an integer number (1009204).

Almost surely, 2^10931987 is an apocalyptic number.

10931987 is a deficient number, since it is larger than the sum of its proper divisors (1178461).

10931987 is a wasteful number, since it uses less digits than its factorization.

10931987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 10931987 is about 3306.3555465195. The cubic root of 10931987 is about 221.9386988171.

The spelling of 10931987 in words is "ten million, nine hundred thirty-one thousand, nine hundred eighty-seven".