80695289 has 2 divisors, whose sum is σ = 80695290. Its totient is φ = 80695288.

The previous prime is 80695283. The next prime is 80695297. The reversal of 80695289 is 98259608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56851600 + 23843689 = 7540^2 + 4883^2 .

It is a cyclic number.

It is not a de Polignac number, because 80695289 - 2¹⁶ = 80629753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80695283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40347644 + 40347645.

It is an arithmetic number, because the mean of its divisors is an integer number (40347645).

Almost surely, 2^80695289 is an apocalyptic number.

It is an amenable number.

80695289 is a deficient number, since it is larger than the sum of its proper divisors (1).

80695289 is an equidigital number, since it uses as much as digits as its factorization.

80695289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 80695289 is about 8983.0556605200. The cubic root of 80695289 is about 432.1316346255.

The spelling of 80695289 in words is "eighty million, six hundred ninety-five thousand, two hundred eighty-nine".