394964637739 has 12 divisors (see below), whose sum is σ = 459676563384. Its totient is φ = 338373189504.

The previous prime is 394964637721. The next prime is 394964637761. The reversal of 394964637739 is 937736469493.

It is not a de Polignac number, because 394964637739 - 2⁵ = 394964637707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394964637239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1899309 + ... + 2096974.

It is an arithmetic number, because the mean of its divisors is an integer number (38306380282).

Almost surely, 2^394964637739 is an apocalyptic number.

394964637739 is a deficient number, since it is larger than the sum of its proper divisors (64711925645).

394964637739 is a wasteful number, since it uses less digits than its factorization.

394964637739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3998314 (or 3998307 counting only the distinct ones).

The product of its digits is 555532992, while the sum is 70.

The spelling of 394964637739 in words is "three hundred ninety-four billion, nine hundred sixty-four million, six hundred thirty-seven thousand, seven hundred thirty-nine".