1813394353 has 4 divisors (see below), whose sum is σ = 1813491568. Its totient is φ = 1813297140.

The previous prime is 1813394327. The next prime is 1813394381. The reversal of 1813394353 is 3534933181.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1813394353 - 2¹³ = 1813386161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1813394393) 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, 10851 + ... + 61192.

It is an arithmetic number, because the mean of its divisors is an integer number (453372892).

Almost surely, 2^1813394353 is an apocalyptic number.

It is an amenable number.

1813394353 is a deficient number, since it is larger than the sum of its proper divisors (97215).

1813394353 is an equidigital number, since it uses as much as digits as its factorization.

1813394353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97214.

The product of its digits is 116640, while the sum is 40.

The square root of 1813394353 is about 42583.9682627160. The cubic root of 1813394353 is about 1219.4502479204.

The spelling of 1813394353 in words is "one billion, eight hundred thirteen million, three hundred ninety-four thousand, three hundred fifty-three".