85998497 has 4 divisors (see below), whose sum is σ = 92613780. Its totient is φ = 79383216.

The previous prime is 85998491. The next prime is 85998499. The reversal of 85998497 is 79489958.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44408896 + 41589601 = 6664^2 + 6449^2 .

It is a cyclic number.

It is not a de Polignac number, because 85998497 - 2⁴ = 85998481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85998491) 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, 3307622 + ... + 3307647.

It is an arithmetic number, because the mean of its divisors is an integer number (23153445).

Almost surely, 2^85998497 is an apocalyptic number.

It is an amenable number.

85998497 is a deficient number, since it is larger than the sum of its proper divisors (6615283).

85998497 is a wasteful number, since it uses less digits than its factorization.

85998497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6615282.

The product of its digits is 6531840, while the sum is 59.

The square root of 85998497 is about 9273.5374588126. The cubic root of 85998497 is about 441.3979248147.

The spelling of 85998497 in words is "eighty-five million, nine hundred ninety-eight thousand, four hundred ninety-seven".