8139706 has 8 divisors (see below), whose sum is σ = 12222324. Its totient is φ = 4065600.

The previous prime is 8139683. The next prime is 8139707. The reversal of 8139706 is 6079318.

It can be written as a sum of positive squares in 2 ways, for example, as 7338681 + 801025 = 2709^2 + 895^2 .

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

It is not an unprimeable number, because it can be changed into a prime (8139707) 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, 1506 + ... + 4306.

Almost surely, 2^8139706 is an apocalyptic number.

8139706 is a deficient number, since it is larger than the sum of its proper divisors (4082618).

8139706 is a wasteful number, since it uses less digits than its factorization.

8139706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 8139706 is about 2853.0169995988. The cubic root of 8139706 is about 201.1575046578.

The spelling of 8139706 in words is "eight million, one hundred thirty-nine thousand, seven hundred six".