85870259 has 2 divisors, whose sum is σ = 85870260. Its totient is φ = 85870258.

The previous prime is 85870243. The next prime is 85870273. The reversal of 85870259 is 95207858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85870259 - 2⁴ = 85870243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85875259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42935129 + 42935130.

It is an arithmetic number, because the mean of its divisors is an integer number (42935130).

Almost surely, 2^85870259 is an apocalyptic number.

85870259 is a deficient number, since it is larger than the sum of its proper divisors (1).

85870259 is an equidigital number, since it uses as much as digits as its factorization.

85870259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 85870259 is about 9266.6206893344. The cubic root of 85870259 is about 441.1784165376.

It can be divided in two parts, 858 and 70259, that added together give a palindrome (71117).

The spelling of 85870259 in words is "eighty-five million, eight hundred seventy thousand, two hundred fifty-nine".