85189379 has 4 divisors (see below), whose sum is σ = 92933880. Its totient is φ = 77444880.

The previous prime is 85189339. The next prime is 85189381. The reversal of 85189379 is 97398158.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85189379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85189339) 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, 3872234 + ... + 3872255.

It is an arithmetic number, because the mean of its divisors is an integer number (23233470).

Almost surely, 2^85189379 is an apocalyptic number.

85189379 is a deficient number, since it is larger than the sum of its proper divisors (7744501).

85189379 is a wasteful number, since it uses less digits than its factorization.

85189379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7744500.

The product of its digits is 544320, while the sum is 50.

The square root of 85189379 is about 9229.8092613011. The cubic root of 85189379 is about 440.0092611687.

The spelling of 85189379 in words is "eighty-five million, one hundred eighty-nine thousand, three hundred seventy-nine".