10686691 has 4 divisors (see below), whose sum is σ = 10947384. Its totient is φ = 10426000.

The previous prime is 10686677. The next prime is 10686713. The reversal of 10686691 is 19668601.

10686691 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 19668601 = 31 ⋅634471.

It is a cyclic number.

It is not a de Polignac number, because 10686691 - 2¹¹ = 10684643 is a prime.

It is a super-2 number, since 2×10686691² = 228410729058962, which contains 22 as substring.

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 10686691.

It is not an unprimeable number, because it can be changed into a prime (10686601) 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, 130285 + ... + 130366.

It is an arithmetic number, because the mean of its divisors is an integer number (2736846).

Almost surely, 2^10686691 is an apocalyptic number.

10686691 is a deficient number, since it is larger than the sum of its proper divisors (260693).

10686691 is an equidigital number, since it uses as much as digits as its factorization.

10686691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260692.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 10686691 is about 3269.0504737615. The cubic root of 10686691 is about 220.2661448438.

The spelling of 10686691 in words is "ten million, six hundred eighty-six thousand, six hundred ninety-one".