1318371899 has 4 divisors (see below), whose sum is σ = 1419785136. Its totient is φ = 1216958664.

The previous prime is 1318371893. The next prime is 1318371919. The reversal of 1318371899 is 9981738131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1318371899 - 2²⁴ = 1301594683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1318371893) 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, 50706599 + ... + 50706624.

It is an arithmetic number, because the mean of its divisors is an integer number (354946284).

Almost surely, 2^1318371899 is an apocalyptic number.

1318371899 is a deficient number, since it is larger than the sum of its proper divisors (101413237).

1318371899 is a wasteful number, since it uses less digits than its factorization.

1318371899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101413236.

The product of its digits is 326592, while the sum is 50.

The square root of 1318371899 is about 36309.3913333727. The cubic root of 1318371899 is about 1096.5101239751.

The spelling of 1318371899 in words is "one billion, three hundred eighteen million, three hundred seventy-one thousand, eight hundred ninety-nine".