85633897 has 4 divisors (see below), whose sum is σ = 88586820. Its totient is φ = 82680976.

The previous prime is 85633861. The next prime is 85633901. The reversal of 85633897 is 79833658.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79833658 = 2 ⋅39916829.

It can be written as a sum of positive squares in 2 ways, for example, as 72522256 + 13111641 = 8516^2 + 3621^2 .

It is a cyclic number.

It is not a de Polignac number, because 85633897 - 2¹⁵ = 85601129 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85633897.

It is not an unprimeable number, because it can be changed into a prime (85633697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1476418 + ... + 1476475.

It is an arithmetic number, because the mean of its divisors is an integer number (22146705).

Almost surely, 2^85633897 is an apocalyptic number.

It is an amenable number.

85633897 is a deficient number, since it is larger than the sum of its proper divisors (2952923).

85633897 is a wasteful number, since it uses less digits than its factorization.

85633897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952922.

The product of its digits is 1088640, while the sum is 49.

The square root of 85633897 is about 9253.8584925424. The cubic root of 85633897 is about 440.7732563295.

The spelling of 85633897 in words is "eighty-five million, six hundred thirty-three thousand, eight hundred ninety-seven".