84799999 has 4 divisors (see below), whose sum is σ = 86772136. Its totient is φ = 82827864.

The previous prime is 84799993. The next prime is 84800017. The reversal of 84799999 is 99999748.

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 84799999 - 2³ = 84799991 is a prime.

It is a Duffinian number.

84799999 is a modest number, since divided by 9999 gives 8479 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 84799999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84799991) 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, 986004 + ... + 986089.

It is an arithmetic number, because the mean of its divisors is an integer number (21693034).

Almost surely, 2^84799999 is an apocalyptic number.

84799999 is a deficient number, since it is larger than the sum of its proper divisors (1972137).

84799999 is a wasteful number, since it uses less digits than its factorization.

84799999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972136.

The product of its digits is 13226976, while the sum is 64.

The square root of 84799999 is about 9208.6914922805. The cubic root of 84799999 is about 439.3378452786.

The spelling of 84799999 in words is "eighty-four million, seven hundred ninety-nine thousand, nine hundred ninety-nine".