84575399 has 4 divisors (see below), whose sum is σ = 84874536. Its totient is φ = 84276264.

The previous prime is 84575383. The next prime is 84575431. The reversal of 84575399 is 99357548.

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 84575399 - 2⁴ = 84575383 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 (84575369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149144 + ... + 149709.

It is an arithmetic number, because the mean of its divisors is an integer number (21218634).

Almost surely, 2^84575399 is an apocalyptic number.

84575399 is a deficient number, since it is larger than the sum of its proper divisors (299137).

84575399 is a wasteful number, since it uses less digits than its factorization.

84575399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299136.

The product of its digits is 1360800, while the sum is 50.

The square root of 84575399 is about 9196.4884059080. The cubic root of 84575399 is about 438.9496278012.

It can be divided in two parts, 8457539 and 9, that added together give a palindrome (8457548).

The spelling of 84575399 in words is "eighty-four million, five hundred seventy-five thousand, three hundred ninety-nine".