3978811959 has 8 divisors (see below), whose sum is σ = 5323189872. Its totient is φ = 2643487680.

The previous prime is 3978811943. The next prime is 3978811979. The reversal of 3978811959 is 9591188793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3978811959 - 2⁴ = 3978811943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978811979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2262382 + ... + 2264139.

It is an arithmetic number, because the mean of its divisors is an integer number (665398734).

Almost surely, 2^3978811959 is an apocalyptic number.

3978811959 is a deficient number, since it is larger than the sum of its proper divisors (1344377913).

3978811959 is a wasteful number, since it uses less digits than its factorization.

3978811959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4526817.

The product of its digits is 4898880, while the sum is 60.

The square root of 3978811959 is about 63077.8246216529. The cubic root of 3978811959 is about 1584.5932619384.

The spelling of 3978811959 in words is "three billion, nine hundred seventy-eight million, eight hundred eleven thousand, nine hundred fifty-nine".