85869897 has 16 divisors (see below), whose sum is σ = 116387712. Its totient is φ = 56307200.

The previous prime is 85869881. The next prime is 85869923. The reversal of 85869897 is 79896858.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 85869897 - 2⁴ = 85869881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85869897.

It is not an unprimeable number, because it can be changed into a prime (85869857) 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, 49753 + ... + 51449.

It is an arithmetic number, because the mean of its divisors is an integer number (7274232).

Almost surely, 2^85869897 is an apocalyptic number.

It is an amenable number.

85869897 is a deficient number, since it is larger than the sum of its proper divisors (30517815).

85869897 is a wasteful number, since it uses less digits than its factorization.

85869897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968.

The product of its digits is 8709120, while the sum is 60.

The square root of 85869897 is about 9266.6011568428. The cubic root of 85869897 is about 441.1777965837.

The spelling of 85869897 in words is "eighty-five million, eight hundred sixty-nine thousand, eight hundred ninety-seven".