84427099 has 4 divisors (see below), whose sum is σ = 84446800. Its totient is φ = 84407400.

The previous prime is 84427093. The next prime is 84427121. The reversal of 84427099 is 99072448.

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 84427099 - 2⁵ = 84427067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84427093) 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, 399 + ... + 13000.

It is an arithmetic number, because the mean of its divisors is an integer number (21111700).

Almost surely, 2^84427099 is an apocalyptic number.

84427099 is a deficient number, since it is larger than the sum of its proper divisors (19701).

84427099 is a wasteful number, since it uses less digits than its factorization.

84427099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19700.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 84427099 is about 9188.4220081579. The cubic root of 84427099 is about 438.6929167652.

The spelling of 84427099 in words is "eighty-four million, four hundred twenty-seven thousand, ninety-nine".