85704123 has 16 divisors (see below), whose sum is σ = 121304736. Its totient is φ = 53637120.

The previous prime is 85704121. The next prime is 85704149. The reversal of 85704123 is 32140758.

It is not a de Polignac number, because 85704123 - 2¹ = 85704121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85704121) 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, 20143 + ... + 24023.

It is an arithmetic number, because the mean of its divisors is an integer number (7581546).

Almost surely, 2^85704123 is an apocalyptic number.

85704123 is a deficient number, since it is larger than the sum of its proper divisors (35600613).

85704123 is a wasteful number, since it uses less digits than its factorization.

85704123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4334.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 85704123 is about 9257.6521321553. The cubic root of 85704123 is about 440.8937120766.

The spelling of 85704123 in words is "eighty-five million, seven hundred four thousand, one hundred twenty-three".