181213794 has 16 divisors (see below), whose sum is σ = 402697440. Its totient is φ = 60404580.

The previous prime is 181213789. The next prime is 181213807. The reversal of 181213794 is 497312181.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1677852 + ... + 1677959.

It is an arithmetic number, because the mean of its divisors is an integer number (25168590).

Almost surely, 2^181213794 is an apocalyptic number.

181213794 is an abundant number, since it is smaller than the sum of its proper divisors (221483646).

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

181213794 is a wasteful number, since it uses less digits than its factorization.

181213794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355822 (or 3355816 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 181213794 is about 13461.5672935955. The cubic root of 181213794 is about 565.8879128933.

The spelling of 181213794 in words is "one hundred eighty-one million, two hundred thirteen thousand, seven hundred ninety-four".