813209084 has 12 divisors (see below), whose sum is σ = 1423321200. Its totient is φ = 406545888.

The previous prime is 813209069. The next prime is 813209149. The reversal of 813209084 is 480902318.

It is a happy number.

It is a super-2 number, since 2×813209084² = 1322618028600238112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35912 + ... + 54000.

It is an arithmetic number, because the mean of its divisors is an integer number (118610100).

Almost surely, 2^813209084 is an apocalyptic number.

It is an amenable number.

813209084 is a deficient number, since it is larger than the sum of its proper divisors (610112116).

813209084 is a wasteful number, since it uses less digits than its factorization.

813209084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29332 (or 29330 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 813209084 is about 28516.8210710801. The cubic root of 813209084 is about 933.3991629872.

The spelling of 813209084 in words is "eight hundred thirteen million, two hundred nine thousand, eighty-four".