85289897 has 16 divisors (see below), whose sum is σ = 109768704. Its totient is φ = 64314000.

The previous prime is 85289891. The next prime is 85289903. The reversal of 85289897 is 79898258.

It is an interprime number because it is at equal distance from previous prime (85289891) and next prime (85289903).

It is a cyclic number.

It is not a de Polignac number, because 85289897 - 2¹⁰ = 85288873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85289891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15479 + ... + 20252.

It is an arithmetic number, because the mean of its divisors is an integer number (6860544).

Almost surely, 2^85289897 is an apocalyptic number.

It is an amenable number.

85289897 is a deficient number, since it is larger than the sum of its proper divisors (24478807).

85289897 is a wasteful number, since it uses less digits than its factorization.

85289897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35780.

The product of its digits is 2903040, while the sum is 56.

The square root of 85289897 is about 9235.2529472668. The cubic root of 85289897 is about 440.1822540429.

It can be divided in two parts, 85 and 289897, that added together give a palindrome (289982).

The spelling of 85289897 in words is "eighty-five million, two hundred eighty-nine thousand, eight hundred ninety-seven".