84912009399 has 96 divisors (see below), whose sum is σ = 150671811840. Its totient is φ = 47096852544.

The previous prime is 84912009397. The next prime is 84912009407. The reversal of 84912009399 is 99390021948.

84912009399 is a `hidden beast` number, since 8 + 49 + 1 + 200 + 9 + 399 = 666.

It is not a de Polignac number, because 84912009399 - 2¹ = 84912009397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84912009397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9268329 + ... + 9277485.

It is an arithmetic number, because the mean of its divisors is an integer number (1569498040).

Almost surely, 2^84912009399 is an apocalyptic number.

84912009399 is a deficient number, since it is larger than the sum of its proper divisors (65759802441).

84912009399 is a wasteful number, since it uses less digits than its factorization.

84912009399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9386 (or 9373 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The spelling of 84912009399 in words is "eighty-four billion, nine hundred twelve million, nine thousand, three hundred ninety-nine".