10987731 has 24 divisors (see below), whose sum is σ = 16656640. Its totient is φ = 7237512.

The previous prime is 10987727. The next prime is 10987751. The reversal of 10987731 is 13778901.

It is not a de Polignac number, because 10987731 - 2² = 10987727 is a prime.

It is a super-2 number, since 2×10987731² = 241460465056722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10987751) 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 23 ways as a sum of consecutive naturals, for example, 24810 + ... + 25248.

Almost surely, 2^10987731 is an apocalyptic number.

10987731 is a deficient number, since it is larger than the sum of its proper divisors (5668909).

10987731 is an equidigital number, since it uses as much as digits as its factorization.

10987731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 10987731 is about 3314.7746529742. The cubic root of 10987731 is about 222.3152934126.

The spelling of 10987731 in words is "ten million, nine hundred eighty-seven thousand, seven hundred thirty-one".