39339681 has 16 divisors (see below), whose sum is σ = 53146560. Its totient is φ = 25882560.

The previous prime is 39339673. The next prime is 39339701. The reversal of 39339681 is 18693393.

It is not a de Polignac number, because 39339681 - 2³ = 39339673 is a prime.

It is a super-2 number, since 2×39339681² = 3095221002363522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39339661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118686 + ... + 119016.

It is an arithmetic number, because the mean of its divisors is an integer number (3321660).

Almost surely, 2^39339681 is an apocalyptic number.

It is an amenable number.

39339681 is a deficient number, since it is larger than the sum of its proper divisors (13806879).

39339681 is a wasteful number, since it uses less digits than its factorization.

39339681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736.

The product of its digits is 104976, while the sum is 42.

The square root of 39339681 is about 6272.1352823421. The cubic root of 39339681 is about 340.1028552714.

The spelling of 39339681 in words is "thirty-nine million, three hundred thirty-nine thousand, six hundred eighty-one".