8139386 has 4 divisors (see below), whose sum is σ = 12209082. Its totient is φ = 4069692.

The previous prime is 8139377. The next prime is 8139403. The reversal of 8139386 is 6839318.

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

It can be written as a sum of positive squares in only one way, i.e., 7756225 + 383161 = 2785^2 + 619^2 .

It is a super-3 number, since 3×8139386³ (a number of 22 digits) contains 333 as substring.

It is an unprimeable number.

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, 2034845 + ... + 2034848.

Almost surely, 2^8139386 is an apocalyptic number.

8139386 is a deficient number, since it is larger than the sum of its proper divisors (4069696).

8139386 is a wasteful number, since it uses less digits than its factorization.

8139386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069695.

The product of its digits is 31104, while the sum is 38.

The square root of 8139386 is about 2852.9609180639. The cubic root of 8139386 is about 201.1548685575.

The spelling of 8139386 in words is "eight million, one hundred thirty-nine thousand, three hundred eighty-six".