84399915 has 16 divisors (see below), whose sum is σ = 135168768. Its totient is φ = 44970336.

The previous prime is 84399907. The next prime is 84399929. The reversal of 84399915 is 51999348.

It is not a de Polignac number, because 84399915 - 2³ = 84399907 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19434 + ... + 23376.

It is an arithmetic number, because the mean of its divisors is an integer number (8448048).

Almost surely, 2^84399915 is an apocalyptic number.

84399915 is a deficient number, since it is larger than the sum of its proper divisors (50768853).

84399915 is a wasteful number, since it uses less digits than its factorization.

84399915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5378.

The product of its digits is 349920, while the sum is 48.

The square root of 84399915 is about 9186.9426361549. The cubic root of 84399915 is about 438.6458279807.

The spelling of 84399915 in words is "eighty-four million, three hundred ninety-nine thousand, nine hundred fifteen".