85197445 has 4 divisors (see below), whose sum is σ = 102236940. Its totient is φ = 68157952.

The previous prime is 85197407. The next prime is 85197457. The reversal of 85197445 is 54479158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54479158 = 2 ⋅27239579.

It can be written as a sum of positive squares in 2 ways, for example, as 51638596 + 33558849 = 7186^2 + 5793^2 .

It is a cyclic number.

It is not a de Polignac number, because 85197445 - 2¹⁹ = 84673157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8519740 + ... + 8519749.

It is an arithmetic number, because the mean of its divisors is an integer number (25559235).

Almost surely, 2^85197445 is an apocalyptic number.

It is an amenable number.

85197445 is a deficient number, since it is larger than the sum of its proper divisors (17039495).

85197445 is a wasteful number, since it uses less digits than its factorization.

85197445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17039494.

The product of its digits is 201600, while the sum is 43.

The square root of 85197445 is about 9230.2462047337. The cubic root of 85197445 is about 440.0231478869.

The spelling of 85197445 in words is "eighty-five million, one hundred ninety-seven thousand, four hundred forty-five".