85434591 has 24 divisors (see below), whose sum is σ = 128614192. Its totient is φ = 50371200.

The previous prime is 85434589. The next prime is 85434599. The reversal of 85434591 is 19543458.

It is not a de Polignac number, because 85434591 - 2¹ = 85434589 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 (85434599) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10251 + ... + 16611.

Almost surely, 2^85434591 is an apocalyptic number.

85434591 is a deficient number, since it is larger than the sum of its proper divisors (43179601).

85434591 is a wasteful number, since it uses less digits than its factorization.

85434591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6423 (or 6412 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 85434591 is about 9243.0834140994. The cubic root of 85434591 is about 440.4310359409.

The spelling of 85434591 in words is "eighty-five million, four hundred thirty-four thousand, five hundred ninety-one".