84561799 has 24 divisors (see below), whose sum is σ = 105313200. Its totient is φ = 67495680.

The previous prime is 84561797. The next prime is 84561817. The reversal of 84561799 is 99716548.

It is not a de Polignac number, because 84561799 - 2¹ = 84561797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84561793) 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 23 ways as a sum of consecutive naturals, for example, 56047 + ... + 57535.

It is an arithmetic number, because the mean of its divisors is an integer number (4388050).

Almost surely, 2^84561799 is an apocalyptic number.

84561799 is a deficient number, since it is larger than the sum of its proper divisors (20751401).

84561799 is a wasteful number, since it uses less digits than its factorization.

84561799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583 (or 1576 counting only the distinct ones).

The product of its digits is 544320, while the sum is 49.

The square root of 84561799 is about 9195.7489635157. The cubic root of 84561799 is about 438.9260983627.

The spelling of 84561799 in words is "eighty-four million, five hundred sixty-one thousand, seven hundred ninety-nine".