3994628739 has 4 divisors (see below), whose sum is σ = 5326171656. Its totient is φ = 2663085824.

The previous prime is 3994628717. The next prime is 3994628773. The reversal of 3994628739 is 9378264993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3994628739 - 2¹² = 3994624643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3994628779) 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, 665771454 + ... + 665771459.

It is an arithmetic number, because the mean of its divisors is an integer number (1331542914).

Almost surely, 2^3994628739 is an apocalyptic number.

3994628739 is a deficient number, since it is larger than the sum of its proper divisors (1331542917).

3994628739 is a wasteful number, since it uses less digits than its factorization.

3994628739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331542916.

The product of its digits is 17635968, while the sum is 60.

The square root of 3994628739 is about 63203.0753919459. The cubic root of 3994628739 is about 1586.6902049143.

The spelling of 3994628739 in words is "three billion, nine hundred ninety-four million, six hundred twenty-eight thousand, seven hundred thirty-nine".