813319194 has 8 divisors (see below), whose sum is σ = 1626638400. Its totient is φ = 271106396.

The previous prime is 813319159. The next prime is 813319201. The reversal of 813319194 is 491913318.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

813319194 is an admirable number.

It is a super-2 number, since 2×813319194² = 1322976222657619272, which contains 22 as substring.

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, 67776594 + ... + 67776605.

It is an arithmetic number, because the mean of its divisors is an integer number (203329800).

Almost surely, 2^813319194 is an apocalyptic number.

813319194 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813319194 is a wasteful number, since it uses less digits than its factorization.

813319194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135553204.

The product of its digits is 23328, while the sum is 39.

The square root of 813319194 is about 28518.7516206443. The cubic root of 813319194 is about 933.4412890716.

It can be divided in two parts, 81331 and 9194, that added together give a triangular number (90525 = T₄₂₅).

The spelling of 813319194 in words is "eight hundred thirteen million, three hundred nineteen thousand, one hundred ninety-four".