84049999 has 4 divisors (see below), whose sum is σ = 91690920. Its totient is φ = 76409080.

The previous prime is 84049969. The next prime is 84050003. The reversal of 84049999 is 99994048.

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

It is not a de Polignac number, because 84049999 - 2⁵ = 84049967 is a prime.

It is a Duffinian number.

84049999 is a modest number, since divided by 9999 gives 8404 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84049919) 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, 3820444 + ... + 3820465.

It is an arithmetic number, because the mean of its divisors is an integer number (22922730).

Almost surely, 2^84049999 is an apocalyptic number.

84049999 is a deficient number, since it is larger than the sum of its proper divisors (7640921).

84049999 is a wasteful number, since it uses less digits than its factorization.

84049999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7640920.

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 84049999 is about 9167.8786532109. The cubic root of 84049999 is about 438.0387902372.

Subtracting 84049999 from its reverse (99994048), we obtain a square (15944049 = 3993²).

The spelling of 84049999 in words is "eighty-four million, forty-nine thousand, nine hundred ninety-nine".