85665394 has 4 divisors (see below), whose sum is σ = 128498094. Its totient is φ = 42832696.

The previous prime is 85665361. The next prime is 85665407. The reversal of 85665394 is 49356658.

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

It can be written as a sum of positive squares in only one way, i.e., 81812025 + 3853369 = 9045^2 + 1963^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21416347 + ... + 21416350.

Almost surely, 2^85665394 is an apocalyptic number.

85665394 is a deficient number, since it is larger than the sum of its proper divisors (42832700).

85665394 is a wasteful number, since it uses less digits than its factorization.

85665394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42832699.

The product of its digits is 777600, while the sum is 46.

The square root of 85665394 is about 9255.5601667322. The cubic root of 85665394 is about 440.8272899696.

The spelling of 85665394 in words is "eighty-five million, six hundred sixty-five thousand, three hundred ninety-four".