8139966393 has 8 divisors (see below), whose sum is σ = 11688156928. Its totient is φ = 5009210064.

The previous prime is 8139966383. The next prime is 8139966407. The reversal of 8139966393 is 3936699318.

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

It is not a de Polignac number, because 8139966393 - 2⁸ = 8139966137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8139966353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104358505 + ... + 104358582.

It is an arithmetic number, because the mean of its divisors is an integer number (1461019616).

Almost surely, 2^8139966393 is an apocalyptic number.

It is an amenable number.

8139966393 is a deficient number, since it is larger than the sum of its proper divisors (3548190535).

8139966393 is a wasteful number, since it uses less digits than its factorization.

8139966393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208717103.

The product of its digits is 5668704, while the sum is 57.

The square root of 8139966393 is about 90221.7623026729. The cubic root of 8139966393 is about 2011.5964967580.

The spelling of 8139966393 in words is "eight billion, one hundred thirty-nine million, nine hundred sixty-six thousand, three hundred ninety-three".