10689439 has 2 divisors, whose sum is σ = 10689440. Its totient is φ = 10689438.

The previous prime is 10689431. The next prime is 10689449. The reversal of 10689439 is 93498601.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10689439 - 2³ = 10689431 is a prime.

It is a super-2 number, since 2×10689439² = 228528212269442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10689431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5344719 + 5344720.

It is an arithmetic number, because the mean of its divisors is an integer number (5344720).

Almost surely, 2^10689439 is an apocalyptic number.

10689439 is a deficient number, since it is larger than the sum of its proper divisors (1).

10689439 is an equidigital number, since it uses as much as digits as its factorization.

10689439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 10689439 is about 3269.4707522778. The cubic root of 10689439 is about 220.2850231380.

The spelling of 10689439 in words is "ten million, six hundred eighty-nine thousand, four hundred thirty-nine".