84381799 has 4 divisors (see below), whose sum is σ = 84402064. Its totient is φ = 84361536.

The previous prime is 84381797. The next prime is 84381811. The reversal of 84381799 is 99718348.

It is a happy number.

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 84381799 - 2¹ = 84381797 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 (84381797) 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, 1347 + ... + 13060.

It is an arithmetic number, because the mean of its divisors is an integer number (21100516).

Almost surely, 2^84381799 is an apocalyptic number.

84381799 is a deficient number, since it is larger than the sum of its proper divisors (20265).

84381799 is a wasteful number, since it uses less digits than its factorization.

84381799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20264.

The product of its digits is 435456, while the sum is 49.

The square root of 84381799 is about 9185.9566186653. The cubic root of 84381799 is about 438.6144413913.

The spelling of 84381799 in words is "eighty-four million, three hundred eighty-one thousand, seven hundred ninety-nine".