10691689 has 4 divisors (see below), whose sum is σ = 10712656. Its totient is φ = 10670724.

The previous prime is 10691663. The next prime is 10691713. The reversal of 10691689 is 98619601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10691689 - 2¹⁷ = 10560617 is a prime.

It is a super-2 number, since 2×10691689² = 228624427345442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10691609) 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, 9699 + ... + 10744.

It is an arithmetic number, because the mean of its divisors is an integer number (2678164).

Almost surely, 2^10691689 is an apocalyptic number.

It is an amenable number.

10691689 is a deficient number, since it is larger than the sum of its proper divisors (20967).

10691689 is an equidigital number, since it uses as much as digits as its factorization.

10691689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20966.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 10691689 is about 3269.8148265613. The cubic root of 10691689 is about 220.3004778477.

The spelling of 10691689 in words is "ten million, six hundred ninety-one thousand, six hundred eighty-nine".