84870099 has 10 divisors (see below), whose sum is σ = 126781380. Its totient is φ = 56580012.

The previous prime is 84870091. The next prime is 84870101. The reversal of 84870099 is 99007848.

It is not a de Polignac number, because 84870099 - 2³ = 84870091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84870091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 523809 + ... + 523970.

It is an arithmetic number, because the mean of its divisors is an integer number (12678138).

Almost surely, 2^84870099 is an apocalyptic number.

84870099 is a deficient number, since it is larger than the sum of its proper divisors (41911281).

84870099 is a wasteful number, since it uses less digits than its factorization.

84870099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047791 (or 1047782 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 84870099 is about 9212.4968928082. The cubic root of 84870099 is about 439.4588716187.

The spelling of 84870099 in words is "eighty-four million, eight hundred seventy thousand, ninety-nine".