80318257 has 2 divisors, whose sum is σ = 80318258. Its totient is φ = 80318256.

The previous prime is 80318239. The next prime is 80318269. The reversal of 80318257 is 75281308.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50112241 + 30206016 = 7079^2 + 5496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80318257 is a prime.

It is not a weakly prime, because it can be changed into another prime (80318237) 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 as a sum of consecutive naturals, namely, 40159128 + 40159129.

It is an arithmetic number, because the mean of its divisors is an integer number (40159129).

Almost surely, 2^80318257 is an apocalyptic number.

It is an amenable number.

80318257 is a deficient number, since it is larger than the sum of its proper divisors (1).

80318257 is an equidigital number, since it uses as much as digits as its factorization.

80318257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 80318257 is about 8962.0453580642. The cubic root of 80318257 is about 431.4575685784.

The spelling of 80318257 in words is "eighty million, three hundred eighteen thousand, two hundred fifty-seven".