80289257 has 2 divisors, whose sum is σ = 80289258. Its totient is φ = 80289256.

The previous prime is 80289241. The next prime is 80289259. The reversal of 80289257 is 75298208.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73085401 + 7203856 = 8549^2 + 2684^2 .

It is a cyclic number.

It is not a de Polignac number, because 80289257 - 2⁴ = 80289241 is a prime.

It is a super-2 number, since 2×80289257² = 12892729579224098, which contains 22 as substring.

Together with 80289259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80289259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40144628 + 40144629.

It is an arithmetic number, because the mean of its divisors is an integer number (40144629).

Almost surely, 2^80289257 is an apocalyptic number.

It is an amenable number.

80289257 is a deficient number, since it is larger than the sum of its proper divisors (1).

80289257 is an equidigital number, since it uses as much as digits as its factorization.

80289257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 80289257 is about 8960.4272777586. The cubic root of 80289257 is about 431.4056344513.

The spelling of 80289257 in words is "eighty million, two hundred eighty-nine thousand, two hundred fifty-seven".