85597399 has 4 divisors (see below), whose sum is σ = 86445000. Its totient is φ = 84749800.

The previous prime is 85597367. The next prime is 85597403. The reversal of 85597399 is 99379558.

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 85597399 - 2⁵ = 85597367 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 (85597339) 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, 423649 + ... + 423850.

It is an arithmetic number, because the mean of its divisors is an integer number (21611250).

Almost surely, 2^85597399 is an apocalyptic number.

85597399 is a deficient number, since it is larger than the sum of its proper divisors (847601).

85597399 is a wasteful number, since it uses less digits than its factorization.

85597399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847600.

The product of its digits is 3061800, while the sum is 55.

The square root of 85597399 is about 9251.8862401134. The cubic root of 85597399 is about 440.7106268143.

The spelling of 85597399 in words is "eighty-five million, five hundred ninety-seven thousand, three hundred ninety-nine".