85251697 has 2 divisors, whose sum is σ = 85251698. Its totient is φ = 85251696.

The previous prime is 85251659. The next prime is 85251701. The reversal of 85251697 is 79615258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59536656 + 25715041 = 7716^2 + 5071^2 .

It is a cyclic number.

It is not a de Polignac number, because 85251697 - 2²³ = 76863089 is a prime.

It is not a weakly prime, because it can be changed into another prime (85251797) 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, 42625848 + 42625849.

It is an arithmetic number, because the mean of its divisors is an integer number (42625849).

Almost surely, 2^85251697 is an apocalyptic number.

It is an amenable number.

85251697 is a deficient number, since it is larger than the sum of its proper divisors (1).

85251697 is an equidigital number, since it uses as much as digits as its factorization.

85251697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 43.

The square root of 85251697 is about 9233.1845535546. The cubic root of 85251697 is about 440.1165273324.

The spelling of 85251697 in words is "eighty-five million, two hundred fifty-one thousand, six hundred ninety-seven".