80191798 has 4 divisors (see below), whose sum is σ = 120287700. Its totient is φ = 40095898.

The previous prime is 80191789. The next prime is 80191801. The reversal of 80191798 is 89719108.

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

It is a congruent 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 as a sum of consecutive naturals, namely, 20047948 + ... + 20047951.

It is an arithmetic number, because the mean of its divisors is an integer number (30071925).

Almost surely, 2^80191798 is an apocalyptic number.

80191798 is a deficient number, since it is larger than the sum of its proper divisors (40095902).

80191798 is a wasteful number, since it uses less digits than its factorization.

80191798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40095901.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 80191798 is about 8954.9873255075. The cubic root of 80191798 is about 431.2310100719.

The spelling of 80191798 in words is "eighty million, one hundred ninety-one thousand, seven hundred ninety-eight".