387949317739 has 4 divisors (see below), whose sum is σ = 391382497656. Its totient is φ = 384516137824.

The previous prime is 387949317733. The next prime is 387949317761. The reversal of 387949317739 is 937713949783.

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-387949317739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387949317733) 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, 1716589789 + ... + 1716590014.

It is an arithmetic number, because the mean of its divisors is an integer number (97845624414).

Almost surely, 2^387949317739 is an apocalyptic number.

387949317739 is a deficient number, since it is larger than the sum of its proper divisors (3433179917).

387949317739 is a wasteful number, since it uses less digits than its factorization.

387949317739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3433179916.

The product of its digits is 216040608, while the sum is 70.

The spelling of 387949317739 in words is "three hundred eighty-seven billion, nine hundred forty-nine million, three hundred seventeen thousand, seven hundred thirty-nine".