1812299663 has 4 divisors (see below), whose sum is σ = 1813968000. Its totient is φ = 1810631328.

The previous prime is 1812299633. The next prime is 1812299669. The reversal of 1812299663 is 3669922181.

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 1812299663 - 2¹² = 1812295567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812299669) 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, 832538 + ... + 834711.

It is an arithmetic number, because the mean of its divisors is an integer number (453492000).

Almost surely, 2^1812299663 is an apocalyptic number.

1812299663 is a deficient number, since it is larger than the sum of its proper divisors (1668337).

1812299663 is a wasteful number, since it uses less digits than its factorization.

1812299663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668336.

The product of its digits is 279936, while the sum is 47.

The square root of 1812299663 is about 42571.1130110548. The cubic root of 1812299663 is about 1219.2048170802.

The spelling of 1812299663 in words is "one billion, eight hundred twelve million, two hundred ninety-nine thousand, six hundred sixty-three".