3947834387493 has 24 divisors (see below), whose sum is σ = 5875623962208. Its totient is φ = 2552416144992.

The previous prime is 3947834387491. The next prime is 3947834387561.

3947834387493 is a `hidden beast` number, since 3 + 9 + 4 + 78 + 34 + 38 + 7 + 493 = 666.

3947834387493 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 3947834387493 - 2¹ = 3947834387491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947834387491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19206171 + ... + 19410632.

It is an arithmetic number, because the mean of its divisors is an integer number (244817665092).

Almost surely, 2^{3947834387493} is an apocalyptic number.

It is an amenable number.

3947834387493 is a deficient number, since it is larger than the sum of its proper divisors (1927789574715).

3947834387493 is a wasteful number, since it uses less digits than its factorization.

3947834387493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38617153 (or 38617150 counting only the distinct ones).

The product of its digits is 1316818944, while the sum is 72.

The spelling of 3947834387493 in words is "three trillion, nine hundred forty-seven billion, eight hundred thirty-four million, three hundred eighty-seven thousand, four hundred ninety-three".