3978373439 has 16 divisors (see below), whose sum is σ = 4363917120. Its totient is φ = 3610037760.

The previous prime is 3978373429. The next prime is 3978373447. The reversal of 3978373439 is 9343738793.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3978373439 - 2⁸ = 3978373183 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 (3978373429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360869 + ... + 371729.

It is an arithmetic number, because the mean of its divisors is an integer number (272744820).

Almost surely, 2^3978373439 is an apocalyptic number.

3978373439 is a deficient number, since it is larger than the sum of its proper divisors (385543681).

3978373439 is a wasteful number, since it uses less digits than its factorization.

3978373439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11650.

The product of its digits is 10287648, while the sum is 56.

The square root of 3978373439 is about 63074.3485023825. The cubic root of 3978373439 is about 1584.5350451161.

The spelling of 3978373439 in words is "three billion, nine hundred seventy-eight million, three hundred seventy-three thousand, four hundred thirty-nine".