3974379643 has 16 divisors (see below), whose sum is σ = 4393267200. Its totient is φ = 3572449056.

The previous prime is 3974379589. The next prime is 3974379677. The reversal of 3974379643 is 3469734793.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3974379643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3974379743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105246 + ... + 137932.

It is an arithmetic number, because the mean of its divisors is an integer number (274579200).

Almost surely, 2^3974379643 is an apocalyptic number.

3974379643 is a deficient number, since it is larger than the sum of its proper divisors (418887557).

3974379643 is a wasteful number, since it uses less digits than its factorization.

3974379643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32946.

The product of its digits is 10287648, while the sum is 55.

The square root of 3974379643 is about 63042.6811216021. The cubic root of 3974379643 is about 1584.0046417056.

The spelling of 3974379643 in words is "three billion, nine hundred seventy-four million, three hundred seventy-nine thousand, six hundred forty-three".