80198779 has 8 divisors (see below), whose sum is σ = 82303488. Its totient is φ = 78110760.

The previous prime is 80198761. The next prime is 80198801. The reversal of 80198779 is 97789108.

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

It is a cyclic number.

It is not a de Polignac number, because 80198779 - 2¹¹ = 80196731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80198719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5874 + ... + 13960.

It is an arithmetic number, because the mean of its divisors is an integer number (10287936).

It is a vampire number, since it can be written as 8087 ⋅ 9917 (with its own digits).

Almost surely, 2^80198779 is an apocalyptic number.

80198779 is a deficient number, since it is larger than the sum of its proper divisors (2104709).

80198779 is a wasteful number, since it uses less digits than its factorization.

80198779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8345.

The product of its (nonzero) digits is 254016, while the sum is 49.

The square root of 80198779 is about 8955.3770998211. The cubic root of 80198779 is about 431.2435231401.

The spelling of 80198779 in words is "eighty million, one hundred ninety-eight thousand, seven hundred seventy-nine".