85989471 has 4 divisors (see below), whose sum is σ = 114652632. Its totient is φ = 57326312.

The previous prime is 85989467. The next prime is 85989493. The reversal of 85989471 is 17498958.

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

It is a cyclic number.

It is not a de Polignac number, because 85989471 - 2² = 85989467 is a prime.

It is a super-3 number, since 3×85989471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85989971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14331576 + ... + 14331581.

It is an arithmetic number, because the mean of its divisors is an integer number (28663158).

Almost surely, 2^85989471 is an apocalyptic number.

85989471 is a deficient number, since it is larger than the sum of its proper divisors (28663161).

85989471 is a wasteful number, since it uses less digits than its factorization.

85989471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28663160.

The product of its digits is 725760, while the sum is 51.

The square root of 85989471 is about 9273.0507924846. The cubic root of 85989471 is about 441.3824819206.

The spelling of 85989471 in words is "eighty-five million, nine hundred eighty-nine thousand, four hundred seventy-one".