85979867 has 4 divisors (see below), whose sum is σ = 88944720. Its totient is φ = 83015016.

The previous prime is 85979849. The next prime is 85979869. The reversal of 85979867 is 76897958.

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-85979867 is a prime.

It is a super-4 number, since 4×85979867⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85979869) 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, 1482383 + ... + 1482440.

It is an arithmetic number, because the mean of its divisors is an integer number (22236180).

Almost surely, 2^85979867 is an apocalyptic number.

85979867 is a deficient number, since it is larger than the sum of its proper divisors (2964853).

85979867 is a wasteful number, since it uses less digits than its factorization.

85979867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964852.

The product of its digits is 7620480, while the sum is 59.

The square root of 85979867 is about 9272.5329333467. The cubic root of 85979867 is about 441.3660489196.

The spelling of 85979867 in words is "eighty-five million, nine hundred seventy-nine thousand, eight hundred sixty-seven".