8129986 has 8 divisors (see below), whose sum is σ = 12836880. Its totient is φ = 3851028.

The previous prime is 8129963. The next prime is 8129999. The reversal of 8129986 is 6899218.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106936 + ... + 107011.

It is an arithmetic number, because the mean of its divisors is an integer number (1604610).

Almost surely, 2^8129986 is an apocalyptic number.

8129986 is a deficient number, since it is larger than the sum of its proper divisors (4706894).

8129986 is a wasteful number, since it uses less digits than its factorization.

8129986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213968.

The product of its digits is 62208, while the sum is 43.

The square root of 8129986 is about 2851.3130308684. The cubic root of 8129986 is about 201.0774022664.

The spelling of 8129986 in words is "eight million, one hundred twenty-nine thousand, nine hundred eighty-six".