80757217 has 2 divisors, whose sum is σ = 80757218. Its totient is φ = 80757216.

The previous prime is 80757211. The next prime is 80757221. The reversal of 80757217 is 71275708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42823936 + 37933281 = 6544^2 + 6159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80757217 is a prime.

It is not a weakly prime, because it can be changed into another prime (80757211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40378608 + 40378609.

It is an arithmetic number, because the mean of its divisors is an integer number (40378609).

Almost surely, 2^80757217 is an apocalyptic number.

It is an amenable number.

80757217 is a deficient number, since it is larger than the sum of its proper divisors (1).

80757217 is an equidigital number, since it uses as much as digits as its factorization.

80757217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27440, while the sum is 37.

The square root of 80757217 is about 8986.5019334555. The cubic root of 80757217 is about 432.2421499785.

The spelling of 80757217 in words is "eighty million, seven hundred fifty-seven thousand, two hundred seventeen".