85973579 has 4 divisors (see below), whose sum is σ = 87595776. Its totient is φ = 84351384.

The previous prime is 85973557. The next prime is 85973581. The reversal of 85973579 is 97537958.

It is a happy number.

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 85973579 - 2²⁴ = 69196363 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 1622143 = 85973579 / (8 + 5 + 9 + 7 + 3 + 5 + 7 + 9).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85973579.

It is not an unprimeable number, because it can be changed into a prime (85973549) 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, 811019 + ... + 811124.

It is an arithmetic number, because the mean of its divisors is an integer number (21898944).

Almost surely, 2^85973579 is an apocalyptic number.

85973579 is a deficient number, since it is larger than the sum of its proper divisors (1622197).

85973579 is a wasteful number, since it uses less digits than its factorization.

85973579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622196.

The product of its digits is 2381400, while the sum is 53.

The square root of 85973579 is about 9272.1938612175. The cubic root of 85973579 is about 441.3552891240.

The spelling of 85973579 in words is "eighty-five million, nine hundred seventy-three thousand, five hundred seventy-nine".