85998019 has 12 divisors (see below), whose sum is σ = 91729144. Its totient is φ = 80607744.

The previous prime is 85998007. The next prime is 85998037. The reversal of 85998019 is 91089958.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-85998019 is a prime.

It is a super-2 number, since 2×85998019² = 14791318543848722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85908019) 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 11 ways as a sum of consecutive naturals, for example, 96952 + ... + 97834.

Almost surely, 2^85998019 is an apocalyptic number.

85998019 is a deficient number, since it is larger than the sum of its proper divisors (5731125).

85998019 is a wasteful number, since it uses less digits than its factorization.

85998019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254 (or 1237 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 49.

The square root of 85998019 is about 9273.5116865188. The cubic root of 85998019 is about 441.3971070152.

The spelling of 85998019 in words is "eighty-five million, nine hundred ninety-eight thousand, nineteen".