1813369963 has 4 divisors (see below), whose sum is σ = 1862380000. Its totient is φ = 1764359928.

The previous prime is 1813369951. The next prime is 1813369967. The reversal of 1813369963 is 3699633181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3699633181 = 15443 ⋅239567.

It is a cyclic number.

It is not a de Polignac number, because 1813369963 - 2⁹ = 1813369451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1813369967) 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, 24504963 + ... + 24505036.

It is an arithmetic number, because the mean of its divisors is an integer number (465595000).

Almost surely, 2^1813369963 is an apocalyptic number.

1813369963 is a deficient number, since it is larger than the sum of its proper divisors (49010037).

1813369963 is an equidigital number, since it uses as much as digits as its factorization.

1813369963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49010036.

The product of its digits is 629856, while the sum is 49.

The square root of 1813369963 is about 42583.6818863752. The cubic root of 1813369963 is about 1219.4447807284. Note that the first 3 decimals are identical.

The spelling of 1813369963 in words is "one billion, eight hundred thirteen million, three hundred sixty-nine thousand, nine hundred sixty-three".