85643101 has 4 divisors (see below), whose sum is σ = 85786204. Its totient is φ = 85500000.

The previous prime is 85643083. The next prime is 85643113. The reversal of 85643101 is 10134658.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10134658 = 2 ⋅5067329.

It can be written as a sum of positive squares in 2 ways, for example, as 51408900 + 34234201 = 7170^2 + 5851^2 .

It is a cyclic number.

It is not a de Polignac number, because 85643101 - 2⁵ = 85643069 is a prime.

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 85643101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85743101) 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, 70650 + ... + 71851.

It is an arithmetic number, because the mean of its divisors is an integer number (21446551).

Almost surely, 2^85643101 is an apocalyptic number.

It is an amenable number.

85643101 is a deficient number, since it is larger than the sum of its proper divisors (143103).

85643101 is a wasteful number, since it uses less digits than its factorization.

85643101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143102.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 85643101 is about 9254.3557852505. The cubic root of 85643101 is about 440.7890473183.

Adding to 85643101 its reverse (10134658), we get a palindrome (95777759).

The spelling of 85643101 in words is "eighty-five million, six hundred forty-three thousand, one hundred one".