39681039 has 8 divisors (see below), whose sum is σ = 52938160. Its totient is φ = 26438976.

The previous prime is 39681017. The next prime is 39681041. The reversal of 39681039 is 93018693.

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

It is not a de Polignac number, because 39681039 - 2⁵ = 39681007 is a prime.

It is a super-2 number, since 2×39681039² = 3149169712239042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39680988 and 39681006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39681539) 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, 6027 + ... + 10755.

It is an arithmetic number, because the mean of its divisors is an integer number (6617270).

Almost surely, 2^39681039 is an apocalyptic number.

39681039 is a deficient number, since it is larger than the sum of its proper divisors (13257121).

39681039 is a wasteful number, since it uses less digits than its factorization.

39681039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7529.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 39681039 is about 6299.2887693771. The cubic root of 39681039 is about 341.0837363122.

The spelling of 39681039 in words is "thirty-nine million, six hundred eighty-one thousand, thirty-nine".