39743789249 has 4 divisors (see below), whose sum is σ = 39746520660. Its totient is φ = 39741057840.

The previous prime is 39743789219. The next prime is 39743789291. The reversal of 39743789249 is 94298734793.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1866844849 + 37876944400 = 43207^2 + 194620^2 .

It is a cyclic number.

It is not a de Polignac number, because 39743789249 - 2⁸ = 39743788993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39743789219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1343762 + ... + 1373019.

It is an arithmetic number, because the mean of its divisors is an integer number (9936630165).

Almost surely, 2^39743789249 is an apocalyptic number.

It is an amenable number.

39743789249 is a deficient number, since it is larger than the sum of its proper divisors (2731411).

39743789249 is a wasteful number, since it uses less digits than its factorization.

39743789249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731410.

The product of its digits is 82301184, while the sum is 65.

The spelling of 39743789249 in words is "thirty-nine billion, seven hundred forty-three million, seven hundred eighty-nine thousand, two hundred forty-nine".