85117588 has 6 divisors (see below), whose sum is σ = 148955786. Its totient is φ = 42558792.

The previous prime is 85117573. The next prime is 85117609. The reversal of 85117588 is 88571158.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 46949904 + 38167684 = 6852^2 + 6178^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10639695 + ... + 10639702.

Almost surely, 2^85117588 is an apocalyptic number.

It is an amenable number.

85117588 is a deficient number, since it is larger than the sum of its proper divisors (63838198).

85117588 is a wasteful number, since it uses less digits than its factorization.

85117588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21279401 (or 21279399 counting only the distinct ones).

The product of its digits is 89600, while the sum is 43.

The square root of 85117588 is about 9225.9193579827. The cubic root of 85117588 is about 439.8856245413.

The spelling of 85117588 in words is "eighty-five million, one hundred seventeen thousand, five hundred eighty-eight".