10688389 has 4 divisors (see below), whose sum is σ = 10695040. Its totient is φ = 10681740.

The previous prime is 10688383. The next prime is 10688401. The reversal of 10688389 is 98388601.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98388601 = 43 ⋅2288107.

It is a cyclic number.

It is not a de Polignac number, because 10688389 - 2⁵ = 10688357 is a prime.

It is a super-2 number, since 2×10688389² = 228483318830642, 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 (10688383) 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 3 ways as a sum of consecutive naturals, for example, 754 + ... + 4684.

It is an arithmetic number, because the mean of its divisors is an integer number (2673760).

Almost surely, 2^10688389 is an apocalyptic number.

It is an amenable number.

10688389 is a deficient number, since it is larger than the sum of its proper divisors (6651).

10688389 is an equidigital number, since it uses as much as digits as its factorization.

10688389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6650.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 10688389 is about 3269.3101718864. The cubic root of 10688389 is about 220.2778101980.

The spelling of 10688389 in words is "ten million, six hundred eighty-eight thousand, three hundred eighty-nine".