1812313899 has 32 divisors (see below), whose sum is σ = 2931962880. Its totient is φ = 1097258400.

The previous prime is 1812313889. The next prime is 1812313903. The reversal of 1812313899 is 9983132181.

1812313899 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1812313899 - 2⁹ = 1812313387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1812313859) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 363129 + ... + 368085.

It is an arithmetic number, because the mean of its divisors is an integer number (91623840).

Almost surely, 2^1812313899 is an apocalyptic number.

1812313899 is a deficient number, since it is larger than the sum of its proper divisors (1119648981).

1812313899 is a wasteful number, since it uses less digits than its factorization.

1812313899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6208 (or 6202 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 1812313899 is about 42571.2802133081. The cubic root of 1812313899 is about 1219.2080094431.

The spelling of 1812313899 in words is "one billion, eight hundred twelve million, three hundred thirteen thousand, eight hundred ninety-nine".