84781318 has 4 divisors (see below), whose sum is σ = 127171980. Its totient is φ = 42390658.

The previous prime is 84781309. The next prime is 84781339. The reversal of 84781318 is 81318748.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21195328 + ... + 21195331.

It is an arithmetic number, because the mean of its divisors is an integer number (31792995).

Almost surely, 2^84781318 is an apocalyptic number.

84781318 is a deficient number, since it is larger than the sum of its proper divisors (42390662).

84781318 is a wasteful number, since it uses less digits than its factorization.

84781318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42390661.

The product of its digits is 43008, while the sum is 40.

The square root of 84781318 is about 9207.6771229230. The cubic root of 84781318 is about 439.3055816263.

The spelling of 84781318 in words is "eighty-four million, seven hundred eighty-one thousand, three hundred eighteen".