1813948963 has 2 divisors, whose sum is σ = 1813948964. Its totient is φ = 1813948962.

The previous prime is 1813948933. The next prime is 1813948979. The reversal of 1813948963 is 3698493181.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3698493181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1813948963 - 2⁵ = 1813948931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1813948963.

It is not a weakly prime, because it can be changed into another prime (1813948933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906974481 + 906974482.

It is an arithmetic number, because the mean of its divisors is an integer number (906974482).

Almost surely, 2^1813948963 is an apocalyptic number.

1813948963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1813948963 is an equidigital number, since it uses as much as digits as its factorization.

1813948963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 52.

The square root of 1813948963 is about 42590.4797225859. The cubic root of 1813948963 is about 1219.5745544663.

The spelling of 1813948963 in words is "one billion, eight hundred thirteen million, nine hundred forty-eight thousand, nine hundred sixty-three".