1812899563 has 2 divisors, whose sum is σ = 1812899564. Its totient is φ = 1812899562.

The previous prime is 1812899531. The next prime is 1812899579. The reversal of 1812899563 is 3659982181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1812899563 - 2⁵ = 1812899531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1812899563.

It is not a weakly prime, because it can be changed into another prime (1812899513) 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 as a sum of consecutive naturals, namely, 906449781 + 906449782.

It is an arithmetic number, because the mean of its divisors is an integer number (906449782).

Almost surely, 2^1812899563 is an apocalyptic number.

1812899563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1812899563 is an equidigital number, since it uses as much as digits as its factorization.

1812899563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 52.

The square root of 1812899563 is about 42578.1582856751. The cubic root of 1812899563 is about 1219.3393276320.

The spelling of 1812899563 in words is "one billion, eight hundred twelve million, eight hundred ninety-nine thousand, five hundred sixty-three".