8139982 has 4 divisors (see below), whose sum is σ = 12209976. Its totient is φ = 4069990.

The previous prime is 8139973. The next prime is 8139983. The reversal of 8139982 is 2899318.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8139983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2034994 + ... + 2034997.

It is an arithmetic number, because the mean of its divisors is an integer number (3052494).

Almost surely, 2^8139982 is an apocalyptic number.

8139982 is a deficient number, since it is larger than the sum of its proper divisors (4069994).

8139982 is a wasteful number, since it uses less digits than its factorization.

8139982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069993.

The product of its digits is 31104, while the sum is 40.

The square root of 8139982 is about 2853.0653690373. The cubic root of 8139982 is about 201.1597782388.

The spelling of 8139982 in words is "eight million, one hundred thirty-nine thousand, nine hundred eighty-two".