85899943 has 4 divisors (see below), whose sum is σ = 88862040. Its totient is φ = 82937848.

The previous prime is 85899941. The next prime is 85899949. The reversal of 85899943 is 34999858.

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

It is a cyclic number.

It is not a de Polignac number, because 85899943 - 2¹ = 85899941 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 (85899941) 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, 1481005 + ... + 1481062.

It is an arithmetic number, because the mean of its divisors is an integer number (22215510).

Almost surely, 2^85899943 is an apocalyptic number.

85899943 is a deficient number, since it is larger than the sum of its proper divisors (2962097).

85899943 is a wasteful number, since it uses less digits than its factorization.

85899943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962096.

The product of its digits is 2799360, while the sum is 55.

The square root of 85899943 is about 9268.2222135639. Note that the first 4 decimals coincide. The cubic root of 85899943 is about 441.2292468311.

The spelling of 85899943 in words is "eighty-five million, eight hundred ninety-nine thousand, nine hundred forty-three".