1812000049 has 4 divisors (see below), whose sum is σ = 1812283200. Its totient is φ = 1811716900.

The previous prime is 1812000023. The next prime is 1812000107. The reversal of 1812000049 is 9400002181.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1812000049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1811999987 and 1812000032.

It is not an unprimeable number, because it can be changed into a prime (1812060049) 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 3 ways as a sum of consecutive naturals, for example, 131749 + ... + 144850.

It is an arithmetic number, because the mean of its divisors is an integer number (453070800).

Almost surely, 2^1812000049 is an apocalyptic number.

It is an amenable number.

1812000049 is a deficient number, since it is larger than the sum of its proper divisors (283151).

1812000049 is an equidigital number, since it uses as much as digits as its factorization.

1812000049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283150.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1812000049 is about 42567.5938831407. The cubic root of 1812000049 is about 1219.1376260280.

The spelling of 1812000049 in words is "one billion, eight hundred twelve million, forty-nine", and thus it is an aban number.