85551959 has 4 divisors (see below), whose sum is σ = 85885104. Its totient is φ = 85218816.

The previous prime is 85551941. The next prime is 85551967. The reversal of 85551959 is 95915558.

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 85551959 - 2¹² = 85547863 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 (85551359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166187 + ... + 166700.

It is an arithmetic number, because the mean of its divisors is an integer number (21471276).

Almost surely, 2^85551959 is an apocalyptic number.

85551959 is a deficient number, since it is larger than the sum of its proper divisors (333145).

85551959 is a wasteful number, since it uses less digits than its factorization.

85551959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333144.

The product of its digits is 405000, while the sum is 47.

The square root of 85551959 is about 9249.4301986663. The cubic root of 85551959 is about 440.6326281998.

The spelling of 85551959 in words is "eighty-five million, five hundred fifty-one thousand, nine hundred fifty-nine".