85198745 has 4 divisors (see below), whose sum is σ = 102238500. Its totient is φ = 68158992.

The previous prime is 85198727. The next prime is 85198759. The reversal of 85198745 is 54789158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54789158 = 2 ⋅27394579.

It can be written as a sum of positive squares in 2 ways, for example, as 54937744 + 30261001 = 7412^2 + 5501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85198745 is a prime.

It is a super-2 number, since 2×85198745² = 14517652299150050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85198745.

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 in 3 ways as a sum of consecutive naturals, for example, 8519870 + ... + 8519879.

It is an arithmetic number, because the mean of its divisors is an integer number (25559625).

Almost surely, 2^85198745 is an apocalyptic number.

It is an amenable number.

85198745 is a deficient number, since it is larger than the sum of its proper divisors (17039755).

85198745 is a wasteful number, since it uses less digits than its factorization.

85198745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17039754.

The product of its digits is 403200, while the sum is 47.

The square root of 85198745 is about 9230.3166251218. The cubic root of 85198745 is about 440.0253859320.

The spelling of 85198745 in words is "eighty-five million, one hundred ninety-eight thousand, seven hundred forty-five".