80722757 has 2 divisors, whose sum is σ = 80722758. Its totient is φ = 80722756.

The previous prime is 80722723. The next prime is 80722769. The reversal of 80722757 is 75722708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61371556 + 19351201 = 7834^2 + 4399^2 .

It is a cyclic number.

It is not a de Polignac number, because 80722757 - 2⁸ = 80722501 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80722757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80722777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40361378 + 40361379.

It is an arithmetic number, because the mean of its divisors is an integer number (40361379).

Almost surely, 2^80722757 is an apocalyptic number.

It is an amenable number.

80722757 is a deficient number, since it is larger than the sum of its proper divisors (1).

80722757 is an equidigital number, since it uses as much as digits as its factorization.

80722757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 80722757 is about 8984.5844088639. The cubic root of 80722757 is about 432.1806603921.

The spelling of 80722757 in words is "eighty million, seven hundred twenty-two thousand, seven hundred fifty-seven".