39939743337539 has 4 divisors (see below), whose sum is σ = 41676253917456. Its totient is φ = 38203232757624.

The previous prime is 39939743337413. The next prime is 39939743337541. The reversal of 39939743337539 is 93573334793993.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39939743337539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39939743337539.

It is not an unprimeable number, because it can be changed into a prime (39939743334539) 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, 868255289924 + ... + 868255289969.

It is an arithmetic number, because the mean of its divisors is an integer number (10419063479364).

Almost surely, 2^{39939743337539} is an apocalyptic number.

39939743337539 is a deficient number, since it is larger than the sum of its proper divisors (1736510579917).

39939743337539 is a wasteful number, since it uses less digits than its factorization.

39939743337539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736510579916.

The product of its digits is 4687309620, while the sum is 77.

The spelling of 39939743337539 in words is "thirty-nine trillion, nine hundred thirty-nine billion, seven hundred forty-three million, three hundred thirty-seven thousand, five hundred thirty-nine".