1209313899 has 6 divisors (see below), whose sum is σ = 1746786756. Its totient is φ = 806209260.

The previous prime is 1209313873. The next prime is 1209313913. The reversal of 1209313899 is 9983139021.

It is a happy number.

It is not a de Polignac number, because 1209313899 - 2¹⁶ = 1209248363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1209313099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67184097 + ... + 67184114.

It is an arithmetic number, because the mean of its divisors is an integer number (291131126).

Almost surely, 2^1209313899 is an apocalyptic number.

1209313899 is a deficient number, since it is larger than the sum of its proper divisors (537472857).

1209313899 is a wasteful number, since it uses less digits than its factorization.

1209313899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134368217 (or 134368214 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 1209313899 is about 34775.1908549759. The cubic root of 1209313899 is about 1065.4007907639.

The spelling of 1209313899 in words is "one billion, two hundred nine million, three hundred thirteen thousand, eight hundred ninety-nine".