1299131199 has 12 divisors (see below), whose sum is σ = 1880862256. Its totient is φ = 864084672.

The previous prime is 1299131147. The next prime is 1299131201. The reversal of 1299131199 is 9911319921.

It is not a de Polignac number, because 1299131199 - 2¹² = 1299127103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299131129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162787 + ... + 170580.

Almost surely, 2^1299131199 is an apocalyptic number.

1299131199 is a deficient number, since it is larger than the sum of its proper divisors (581731057).

1299131199 is a wasteful number, since it uses less digits than its factorization.

1299131199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333806 (or 333803 counting only the distinct ones).

The product of its digits is 39366, while the sum is 45.

The square root of 1299131199 is about 36043.4626388753. The cubic root of 1299131199 is about 1091.1496998464.

The spelling of 1299131199 in words is "one billion, two hundred ninety-nine million, one hundred thirty-one thousand, one hundred ninety-nine".