84452591 has 4 divisors (see below), whose sum is σ = 84757752. Its totient is φ = 84147432.

The previous prime is 84452581. The next prime is 84452593. The reversal of 84452591 is 19525448.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84452591 is a prime.

It is a super-2 number, since 2×84452591² = 14264480253226562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84452593) 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, 152165 + ... + 152718.

It is an arithmetic number, because the mean of its divisors is an integer number (21189438).

Almost surely, 2^84452591 is an apocalyptic number.

84452591 is a deficient number, since it is larger than the sum of its proper divisors (305161).

84452591 is a wasteful number, since it uses less digits than its factorization.

84452591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305160.

The product of its digits is 57600, while the sum is 38.

The square root of 84452591 is about 9189.8090839799. The cubic root of 84452591 is about 438.7370654434.

It can be divided in two parts, 844 and 52591, that added together give a palindrome (53435).

The spelling of 84452591 in words is "eighty-four million, four hundred fifty-two thousand, five hundred ninety-one".