10687731 has 4 divisors (see below), whose sum is σ = 14250312. Its totient is φ = 7125152.

The previous prime is 10687727. The next prime is 10687811. The reversal of 10687731 is 13778601.

10687731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10687731 - 2² = 10687727 is a prime.

It is a super-2 number, since 2×10687731² = 228455187856722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10687692 and 10687701.

It is not an unprimeable number, because it can be changed into a prime (10687231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1781286 + ... + 1781291.

It is an arithmetic number, because the mean of its divisors is an integer number (3562578).

Almost surely, 2^10687731 is an apocalyptic number.

10687731 is a deficient number, since it is larger than the sum of its proper divisors (3562581).

10687731 is an equidigital number, since it uses as much as digits as its factorization.

10687731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3562580.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 10687731 is about 3269.2095374876. The cubic root of 10687731 is about 220.2732898481.

The spelling of 10687731 in words is "ten million, six hundred eighty-seven thousand, seven hundred thirty-one".