81230194 has 8 divisors (see below), whose sum is σ = 124437888. Its totient is φ = 39750900.

The previous prime is 81230173. The next prime is 81230209. The reversal of 81230194 is 49103218.

It is a happy number.

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

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, 431982 + ... + 432169.

It is an arithmetic number, because the mean of its divisors is an integer number (15554736).

Almost surely, 2^81230194 is an apocalyptic number.

81230194 is a deficient number, since it is larger than the sum of its proper divisors (43207694).

81230194 is a wasteful number, since it uses less digits than its factorization.

81230194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864200.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 81230194 is about 9012.7794824904. The cubic root of 81230194 is about 433.0843565146.

The spelling of 81230194 in words is "eighty-one million, two hundred thirty thousand, one hundred ninety-four".