85897491 has 4 divisors (see below), whose sum is σ = 114529992. Its totient is φ = 57264992.

The previous prime is 85897459. The next prime is 85897517. The reversal of 85897491 is 19479858.

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 85897491 - 2⁵ = 85897459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85897891) 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 in 3 ways as a sum of consecutive naturals, for example, 14316246 + ... + 14316251.

It is an arithmetic number, because the mean of its divisors is an integer number (28632498).

Almost surely, 2^85897491 is an apocalyptic number.

85897491 is a deficient number, since it is larger than the sum of its proper divisors (28632501).

85897491 is a wasteful number, since it uses less digits than its factorization.

85897491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28632500.

The product of its digits is 725760, while the sum is 51.

The square root of 85897491 is about 9268.0899326668. The cubic root of 85897491 is about 441.2250485186.

The spelling of 85897491 in words is "eighty-five million, eight hundred ninety-seven thousand, four hundred ninety-one".