10689391 has 2 divisors, whose sum is σ = 10689392. Its totient is φ = 10689390.

The previous prime is 10689383. The next prime is 10689421. The reversal of 10689391 is 19398601.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10689391 - 2³ = 10689383 is a prime.

It is a super-2 number, since 2×10689391² = 228526159901762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10689391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10680391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5344695 + 5344696.

It is an arithmetic number, because the mean of its divisors is an integer number (5344696).

Almost surely, 2^10689391 is an apocalyptic number.

10689391 is a deficient number, since it is larger than the sum of its proper divisors (1).

10689391 is an equidigital number, since it uses as much as digits as its factorization.

10689391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 10689391 is about 3269.4634116319. The cubic root of 10689391 is about 220.2846934139.

The spelling of 10689391 in words is "ten million, six hundred eighty-nine thousand, three hundred ninety-one".