3949391939494 has 8 divisors (see below), whose sum is σ = 5979453217128. Its totient is φ = 1956240867120.

The previous prime is 3949391939417. The next prime is 3949391939497. The reversal of 3949391939494 is 4949391939493.

3949391939494 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 3949391939494.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949391939497) 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, 9227551047 + ... + 9227551474.

It is an arithmetic number, because the mean of its divisors is an integer number (747431652141).

Almost surely, 2^{3949391939494} is an apocalyptic number.

3949391939494 is a deficient number, since it is larger than the sum of its proper divisors (2030061277634).

3949391939494 is a wasteful number, since it uses less digits than its factorization.

3949391939494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18455102630.

The product of its digits is 918330048, while the sum is 76.

Subtracting 3949391939494 from its reverse (4949391939493), we obtain a palindrome (999999999999).

The spelling of 3949391939494 in words is "three trillion, nine hundred forty-nine billion, three hundred ninety-one million, nine hundred thirty-nine thousand, four hundred ninety-four".