85434891 has 8 divisors (see below), whose sum is σ = 115844160. Its totient is φ = 55991112.

The previous prime is 85434863. The next prime is 85434913. The reversal of 85434891 is 19843458.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85434891 - 2⁶ = 85434827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85434191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241165 + ... + 241518.

It is an arithmetic number, because the mean of its divisors is an integer number (14480520).

Almost surely, 2^85434891 is an apocalyptic number.

85434891 is a deficient number, since it is larger than the sum of its proper divisors (30409269).

85434891 is a wasteful number, since it uses less digits than its factorization.

85434891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482745.

The product of its digits is 138240, while the sum is 42.

The square root of 85434891 is about 9243.0996424360. The cubic root of 85434891 is about 440.4315514587.

The spelling of 85434891 in words is "eighty-five million, four hundred thirty-four thousand, eight hundred ninety-one".