80497779 has 4 divisors (see below), whose sum is σ = 107330376. Its totient is φ = 53665184.

The previous prime is 80497751. The next prime is 80497783. The reversal of 80497779 is 97779408.

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

It is a cyclic number.

It is not a de Polignac number, because 80497779 - 2⁹ = 80497267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80497709) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13416294 + ... + 13416299.

It is an arithmetic number, because the mean of its divisors is an integer number (26832594).

Almost surely, 2^80497779 is an apocalyptic number.

80497779 is a deficient number, since it is larger than the sum of its proper divisors (26832597).

80497779 is a wasteful number, since it uses less digits than its factorization.

80497779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26832596.

The product of its (nonzero) digits is 889056, while the sum is 51.

The square root of 80497779 is about 8972.0554501184. The cubic root of 80497779 is about 431.7787844174.

The spelling of 80497779 in words is "eighty million, four hundred ninety-seven thousand, seven hundred seventy-nine".