812993198 has 4 divisors (see below), whose sum is σ = 1219489800. Its totient is φ = 406496598.

The previous prime is 812993173. The next prime is 812993201. The reversal of 812993198 is 891399218.

It is a happy number.

812993198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-5 number, since 5×812993198⁵ (a number of 46 digits) contains 55555 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203248298 + ... + 203248301.

It is an arithmetic number, because the mean of its divisors is an integer number (304872450).

Almost surely, 2^812993198 is an apocalyptic number.

812993198 is a deficient number, since it is larger than the sum of its proper divisors (406496602).

812993198 is a wasteful number, since it uses less digits than its factorization.

812993198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406496601.

The product of its digits is 279936, while the sum is 50.

The square root of 812993198 is about 28513.0355802394. The cubic root of 812993198 is about 933.3165578901.

The spelling of 812993198 in words is "eight hundred twelve million, nine hundred ninety-three thousand, one hundred ninety-eight".