39681349289 has 4 divisors (see below), whose sum is σ = 42015546324. Its totient is φ = 37347152256.

The previous prime is 39681349283. The next prime is 39681349291. The reversal of 39681349289 is 98294318693.

It is a happy number.

39681349289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98294318693 = 1259 ⋅78073327.

It can be written as a sum of positive squares in 2 ways, for example, as 19198873600 + 20482475689 = 138560^2 + 143117^2 .

It is a cyclic number.

It is not a de Polignac number, because 39681349289 - 2⁸ = 39681349033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39681349283) 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, 1167098492 + ... + 1167098525.

It is an arithmetic number, because the mean of its divisors is an integer number (10503886581).

Almost surely, 2^39681349289 is an apocalyptic number.

It is an amenable number.

39681349289 is a deficient number, since it is larger than the sum of its proper divisors (2334197035).

39681349289 is a wasteful number, since it uses less digits than its factorization.

39681349289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334197034.

The product of its digits is 20155392, while the sum is 62.

The spelling of 39681349289 in words is "thirty-nine billion, six hundred eighty-one million, three hundred forty-nine thousand, two hundred eighty-nine".