80722747 has 12 divisors (see below), whose sum is σ = 97141680. Its totient is φ = 66803856.

The previous prime is 80722723. The next prime is 80722757. The reversal of 80722747 is 74722708.

It is a de Polignac number, because none of the positive numbers 2^k-80722747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80722757) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26983 + ... + 29824.

It is an arithmetic number, because the mean of its divisors is an integer number (8095140).

Almost surely, 2^80722747 is an apocalyptic number.

80722747 is a deficient number, since it is larger than the sum of its proper divisors (16418933).

80722747 is a wasteful number, since it uses less digits than its factorization.

80722747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56850 (or 56843 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 80722747 is about 8984.5838523551. The cubic root of 80722747 is about 432.1806425458.

The spelling of 80722747 in words is "eighty million, seven hundred twenty-two thousand, seven hundred forty-seven".