85844399 has 4 divisors (see below), whose sum is σ = 86161440. Its totient is φ = 85527360.

The previous prime is 85844387. The next prime is 85844401. The reversal of 85844399 is 99344858.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85844399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85844359) 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, 158114 + ... + 158655.

It is an arithmetic number, because the mean of its divisors is an integer number (21540360).

Almost surely, 2^85844399 is an apocalyptic number.

85844399 is a deficient number, since it is larger than the sum of its proper divisors (317041).

85844399 is a wasteful number, since it uses less digits than its factorization.

85844399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317040.

The product of its digits is 1244160, while the sum is 50.

The square root of 85844399 is about 9265.2252536029. The cubic root of 85844399 is about 441.1341248374.

The spelling of 85844399 in words is "eighty-five million, eight hundred forty-four thousand, three hundred ninety-nine".