85260191 has 4 divisors (see below), whose sum is σ = 85332384. Its totient is φ = 85188000.

The previous prime is 85260179. The next prime is 85260229. The reversal of 85260191 is 19106258.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85260191 - 2¹⁸ = 84998047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85260101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34295 + ... + 36696.

It is an arithmetic number, because the mean of its divisors is an integer number (21333096).

Almost surely, 2^85260191 is an apocalyptic number.

85260191 is a deficient number, since it is larger than the sum of its proper divisors (72193).

85260191 is a wasteful number, since it uses less digits than its factorization.

85260191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72192.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 85260191 is about 9233.6445134086. The cubic root of 85260191 is about 440.1311437594.

The spelling of 85260191 in words is "eighty-five million, two hundred sixty thousand, one hundred ninety-one".