1299839986 has 8 divisors (see below), whose sum is σ = 2034532224. Its totient is φ = 621662580.

The previous prime is 1299839977. The next prime is 1299839987. The reversal of 1299839986 is 6899389921.

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 (1299839987) 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, 14128650 + ... + 14128741.

It is an arithmetic number, because the mean of its divisors is an integer number (254316528).

Almost surely, 2^1299839986 is an apocalyptic number.

1299839986 is a deficient number, since it is larger than the sum of its proper divisors (734692238).

1299839986 is a wasteful number, since it uses less digits than its factorization.

1299839986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28257416.

The product of its digits is 15116544, while the sum is 64.

The square root of 1299839986 is about 36053.2936914230. The cubic root of 1299839986 is about 1091.3481022133.

The spelling of 1299839986 in words is "one billion, two hundred ninety-nine million, eight hundred thirty-nine thousand, nine hundred eighty-six".