1812299249 has 8 divisors (see below), whose sum is σ = 1908075840. Its totient is φ = 1716561936.

The previous prime is 1812299231. The next prime is 1812299299. The reversal of 1812299249 is 9429922181.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1812299249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1812299299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163487 + ... + 174219.

It is an arithmetic number, because the mean of its divisors is an integer number (238509480).

Almost surely, 2^1812299249 is an apocalyptic number.

1812299249 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1812299249 is a deficient number, since it is larger than the sum of its proper divisors (95776591).

1812299249 is a wasteful number, since it uses less digits than its factorization.

1812299249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19639.

The product of its digits is 186624, while the sum is 47.

The square root of 1812299249 is about 42571.1081486024. The cubic root of 1812299249 is about 1219.2047242422.

The spelling of 1812299249 in words is "one billion, eight hundred twelve million, two hundred ninety-nine thousand, two hundred forty-nine".