85304591 has 4 divisors (see below), whose sum is σ = 88056384. Its totient is φ = 82552800.

The previous prime is 85304579. The next prime is 85304603. The reversal of 85304591 is 19540358.

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

It is an interprime number because it is at equal distance from previous prime (85304579) and next prime (85304603).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85304591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85304551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1375850 + ... + 1375911.

It is an arithmetic number, because the mean of its divisors is an integer number (22014096).

Almost surely, 2^85304591 is an apocalyptic number.

85304591 is a deficient number, since it is larger than the sum of its proper divisors (2751793).

85304591 is a wasteful number, since it uses less digits than its factorization.

85304591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2751792.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 85304591 is about 9236.0484515836. The cubic root of 85304591 is about 440.2075312323.

The spelling of 85304591 in words is "eighty-five million, three hundred four thousand, five hundred ninety-one".