84398905 has 8 divisors (see below), whose sum is σ = 101610432. Its totient is φ = 67297968.

The previous prime is 84398879. The next prime is 84398917. The reversal of 84398905 is 50989348.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84398905 - 2⁷ = 84398777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25957 + ... + 29026.

It is an arithmetic number, because the mean of its divisors is an integer number (12701304).

Almost surely, 2^84398905 is an apocalyptic number.

It is an amenable number.

84398905 is a deficient number, since it is larger than the sum of its proper divisors (17211527).

84398905 is a wasteful number, since it uses less digits than its factorization.

84398905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55295.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 84398905 is about 9186.8876666693. The cubic root of 84398905 is about 438.6440782394.

The spelling of 84398905 in words is "eighty-four million, three hundred ninety-eight thousand, nine hundred five".