10688691 has 8 divisors (see below), whose sum is σ = 15347920. Its totient is φ = 6577632.

The previous prime is 10688687. The next prime is 10688719. The reversal of 10688691 is 19688601.

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

It is not a de Polignac number, because 10688691 - 2² = 10688687 is a prime.

It is a super-2 number, since 2×10688691² = 228496230586962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 274069 = 10688691 / (1 + 0 + 6 + 8 + 8 + 6 + 9 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10688611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136996 + ... + 137073.

It is an arithmetic number, because the mean of its divisors is an integer number (1918490).

Almost surely, 2^10688691 is an apocalyptic number.

10688691 is a deficient number, since it is larger than the sum of its proper divisors (4659229).

10688691 is a wasteful number, since it uses less digits than its factorization.

10688691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274085.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 10688691 is about 3269.3563586737. The cubic root of 10688691 is about 220.2798848253.

The spelling of 10688691 in words is "ten million, six hundred eighty-eight thousand, six hundred ninety-one".