85423899 has 16 divisors (see below), whose sum is σ = 125023104. Its totient is φ = 51451200.

The previous prime is 85423889. The next prime is 85423901. The reversal of 85423899 is 99832458.

It is not a de Polignac number, because 85423899 - 2⁸ = 85423643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85423859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2562 + ... + 13319.

It is an arithmetic number, because the mean of its divisors is an integer number (7813944).

Almost surely, 2^85423899 is an apocalyptic number.

85423899 is a deficient number, since it is larger than the sum of its proper divisors (39599205).

85423899 is a wasteful number, since it uses less digits than its factorization.

85423899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16058.

The product of its digits is 622080, while the sum is 48.

The square root of 85423899 is about 9242.5050175805. The cubic root of 85423899 is about 440.4126620987.

It can be divided in two parts, 854 and 23899, that added together give a triangular number (24753 = T₂₂₂).

The spelling of 85423899 in words is "eighty-five million, four hundred twenty-three thousand, eight hundred ninety-nine".