80695129 has 2 divisors, whose sum is σ = 80695130. Its totient is φ = 80695128.

The previous prime is 80695127. The next prime is 80695151. The reversal of 80695129 is 92159608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45589504 + 35105625 = 6752^2 + 5925^2 .

It is a cyclic number.

It is not a de Polignac number, because 80695129 - 2¹ = 80695127 is a prime.

Together with 80695127, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 80695091 and 80695100.

It is not a weakly prime, because it can be changed into another prime (80695127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40347564 + 40347565.

It is an arithmetic number, because the mean of its divisors is an integer number (40347565).

Almost surely, 2^80695129 is an apocalyptic number.

It is an amenable number.

80695129 is a deficient number, since it is larger than the sum of its proper divisors (1).

80695129 is an equidigital number, since it uses as much as digits as its factorization.

80695129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 80695129 is about 8983.0467548600. The cubic root of 80695129 is about 432.1313490198.

The spelling of 80695129 in words is "eighty million, six hundred ninety-five thousand, one hundred twenty-nine".