813104219 has 4 divisors (see below), whose sum is σ = 813262296. Its totient is φ = 812946144.

The previous prime is 813104207. The next prime is 813104263. The reversal of 813104219 is 912401318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813104219 is a prime.

It is a super-2 number, since 2×813104219² = 1322276941911199922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 813104191 and 813104200.

It is not an unprimeable number, because it can be changed into a prime (813104819) 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, 71054 + ... + 81699.

It is an arithmetic number, because the mean of its divisors is an integer number (203315574).

Almost surely, 2^813104219 is an apocalyptic number.

813104219 is a deficient number, since it is larger than the sum of its proper divisors (158077).

813104219 is a wasteful number, since it uses less digits than its factorization.

813104219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158076.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 813104219 is about 28514.9823601559. The cubic root of 813104219 is about 933.3590400091.

The spelling of 813104219 in words is "eight hundred thirteen million, one hundred four thousand, two hundred nineteen".