10439681 has 8 divisors (see below), whose sum is σ = 12342720. Its totient is φ = 8639568.

The previous prime is 10439659. The next prime is 10439701. The reversal of 10439681 is 18693401.

It is a happy number.

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

It is not a de Polignac number, because 10439681 - 2⁶ = 10439617 is a prime.

It is a super-2 number, since 2×10439681² = 217973878763522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10439641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25511 + ... + 25916.

It is an arithmetic number, because the mean of its divisors is an integer number (1542840).

Almost surely, 2^10439681 is an apocalyptic number.

It is an amenable number.

10439681 is a deficient number, since it is larger than the sum of its proper divisors (1903039).

10439681 is an equidigital number, since it uses as much as digits as its factorization.

10439681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51463.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 10439681 is about 3231.0495198929. The cubic root of 10439681 is about 218.5558368541. Note that the first 3 decimals are identical.

The spelling of 10439681 in words is "ten million, four hundred thirty-nine thousand, six hundred eighty-one".