3978253439 has 4 divisors (see below), whose sum is σ = 4037630424. Its totient is φ = 3918876456.

The previous prime is 3978253361. The next prime is 3978253451. The reversal of 3978253439 is 9343528793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9343528793 = 107 ⋅87322699.

It is a cyclic number.

It is not a de Polignac number, because 3978253439 - 2⁸ = 3978253183 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 (3978253039) 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, 29688392 + ... + 29688525.

It is an arithmetic number, because the mean of its divisors is an integer number (1009407606).

Almost surely, 2^3978253439 is an apocalyptic number.

3978253439 is a deficient number, since it is larger than the sum of its proper divisors (59376985).

3978253439 is an equidigital number, since it uses as much as digits as its factorization.

3978253439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59376984.

The product of its digits is 4898880, while the sum is 53.

The square root of 3978253439 is about 63073.3972368700. The cubic root of 3978253439 is about 1584.5191134696.

The spelling of 3978253439 in words is "three billion, nine hundred seventy-eight million, two hundred fifty-three thousand, four hundred thirty-nine".