84999998 has 4 divisors (see below), whose sum is σ = 127500000. Its totient is φ = 42499998.

The previous prime is 84999979. The next prime is 85000007. The reversal of 84999998 is 89999948.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21249998 + ... + 21250001.

It is an arithmetic number, because the mean of its divisors is an integer number (31875000).

Almost surely, 2^84999998 is an apocalyptic number.

84999998 is a deficient number, since it is larger than the sum of its proper divisors (42500002).

84999998 is a wasteful number, since it uses less digits than its factorization.

84999998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42500001.

The product of its digits is 15116544, while the sum is 65.

The square root of 84999998 is about 9219.5443488277. The cubic root of 84999998 is about 439.6829637673.

The spelling of 84999998 in words is "eighty-four million, nine hundred ninety-nine thousand, nine hundred ninety-eight".