39896682709 has 4 divisors (see below), whose sum is σ = 42965658316. Its totient is φ = 36827707104.

The previous prime is 39896682703. The next prime is 39896682737. The reversal of 39896682709 is 90728669893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90728669893 = 971 ⋅93438383.

It can be written as a sum of positive squares in 2 ways, for example, as 21449067025 + 18447615684 = 146455^2 + 135822^2 .

It is a cyclic number.

It is not a de Polignac number, because 39896682709 - 2¹⁵ = 39896649941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39896682703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1534487784 + ... + 1534487809.

It is an arithmetic number, because the mean of its divisors is an integer number (10741414579).

Almost surely, 2^39896682709 is an apocalyptic number.

It is an amenable number.

39896682709 is a deficient number, since it is larger than the sum of its proper divisors (3068975607).

39896682709 is a wasteful number, since it uses less digits than its factorization.

39896682709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068975606.

The product of its (nonzero) digits is 70543872, while the sum is 67.

The spelling of 39896682709 in words is "thirty-nine billion, eight hundred ninety-six million, six hundred eighty-two thousand, seven hundred nine".