85251659 has 2 divisors, whose sum is σ = 85251660. Its totient is φ = 85251658.

The previous prime is 85251653. The next prime is 85251697. The reversal of 85251659 is 95615258.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85251659 is a prime.

It is not a weakly prime, because it can be changed into another prime (85251653) 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, 42625829 + 42625830.

It is an arithmetic number, because the mean of its divisors is an integer number (42625830).

Almost surely, 2^85251659 is an apocalyptic number.

85251659 is a deficient number, since it is larger than the sum of its proper divisors (1).

85251659 is an equidigital number, since it uses as much as digits as its factorization.

85251659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108000, while the sum is 41.

The square root of 85251659 is about 9233.1824957595. The cubic root of 85251659 is about 440.1164619400.

The spelling of 85251659 in words is "eighty-five million, two hundred fifty-one thousand, six hundred fifty-nine".