85188319 has 4 divisors (see below), whose sum is σ = 87490744. Its totient is φ = 82885896.

The previous prime is 85188317. The next prime is 85188353. The reversal of 85188319 is 91388158.

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

It is a cyclic number.

It is not a de Polignac number, because 85188319 - 2¹ = 85188317 is a prime.

It is a super-2 number, since 2×85188319² = 14514099388091522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85188317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1151157 + ... + 1151230.

It is an arithmetic number, because the mean of its divisors is an integer number (21872686).

Almost surely, 2^85188319 is an apocalyptic number.

85188319 is a deficient number, since it is larger than the sum of its proper divisors (2302425).

85188319 is a wasteful number, since it uses less digits than its factorization.

85188319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302424.

The product of its digits is 69120, while the sum is 43.

The square root of 85188319 is about 9229.7518384841. The cubic root of 85188319 is about 440.0074361691.

The spelling of 85188319 in words is "eighty-five million, one hundred eighty-eight thousand, three hundred nineteen".