85783579 has 4 divisors (see below), whose sum is σ = 98038384. Its totient is φ = 73528776.

The previous prime is 85783573. The next prime is 85783609. The reversal of 85783579 is 97538758.

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 85783579 - 2¹⁷ = 85652507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85783573) 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, 6127392 + ... + 6127405.

It is an arithmetic number, because the mean of its divisors is an integer number (24509596).

Almost surely, 2^85783579 is an apocalyptic number.

85783579 is a deficient number, since it is larger than the sum of its proper divisors (12254805).

85783579 is a wasteful number, since it uses less digits than its factorization.

85783579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12254804.

The product of its digits is 2116800, while the sum is 52.

The square root of 85783579 is about 9261.9425068395. The cubic root of 85783579 is about 441.0299203446.

The spelling of 85783579 in words is "eighty-five million, seven hundred eighty-three thousand, five hundred seventy-nine".