813425194 has 4 divisors (see below), whose sum is σ = 1220137794. Its totient is φ = 406712596.

The previous prime is 813425191. The next prime is 813425227. The reversal of 813425194 is 491524318.

813425194 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 can be written as a sum of positive squares in only one way, i.e., 801625969 + 11799225 = 28313^2 + 3435^2 .

It is not an unprimeable number, because it can be changed into a prime (813425191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203356297 + ... + 203356300.

Almost surely, 2^813425194 is an apocalyptic number.

813425194 is a deficient number, since it is larger than the sum of its proper divisors (406712600).

813425194 is a wasteful number, since it uses less digits than its factorization.

813425194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406712599.

The product of its digits is 34560, while the sum is 37.

The square root of 813425194 is about 28520.6099864642. The cubic root of 813425194 is about 933.4818391529.

The spelling of 813425194 in words is "eight hundred thirteen million, four hundred twenty-five thousand, one hundred ninety-four".