85783899 has 4 divisors (see below), whose sum is σ = 114378536. Its totient is φ = 57189264.

The previous prime is 85783891. The next prime is 85783937. The reversal of 85783899 is 99838758.

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

It is not a de Polignac number, because 85783899 - 2³ = 85783891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85783891) 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, 14297314 + ... + 14297319.

It is an arithmetic number, because the mean of its divisors is an integer number (28594634).

Almost surely, 2^85783899 is an apocalyptic number.

85783899 is a deficient number, since it is larger than the sum of its proper divisors (28594637).

85783899 is a wasteful number, since it uses less digits than its factorization.

85783899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28594636.

The product of its digits is 4354560, while the sum is 57.

The square root of 85783899 is about 9261.9597818172. The cubic root of 85783899 is about 441.0304687378.

The spelling of 85783899 in words is "eighty-five million, seven hundred eighty-three thousand, eight hundred ninety-nine".