1299090849 has 8 divisors (see below), whose sum is σ = 1979567040. Its totient is φ = 742337616.

The previous prime is 1299090847. The next prime is 1299090917. The reversal of 1299090849 is 9480909921.

It is a happy number.

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

It is not a de Polignac number, because 1299090849 - 2¹ = 1299090847 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1299090847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30930714 + ... + 30930755.

It is an arithmetic number, because the mean of its divisors is an integer number (247445880).

Almost surely, 2^1299090849 is an apocalyptic number.

It is an amenable number.

1299090849 is a deficient number, since it is larger than the sum of its proper divisors (680476191).

1299090849 is an equidigital number, since it uses as much as digits as its factorization.

1299090849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61861479.

The product of its (nonzero) digits is 419904, while the sum is 51.

The square root of 1299090849 is about 36042.9028936350. The cubic root of 1299090849 is about 1091.1384029770.

The spelling of 1299090849 in words is "one billion, two hundred ninety-nine million, ninety thousand, eight hundred forty-nine".