84997578 has 8 divisors (see below), whose sum is σ = 169995168. Its totient is φ = 28332524.

The previous prime is 84997559. The next prime is 84997597. The reversal of 84997578 is 87579948.

It is an interprime number because it is at equal distance from previous prime (84997559) and next prime (84997597).

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

84997578 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7083126 + ... + 7083137.

It is an arithmetic number, because the mean of its divisors is an integer number (21249396).

Almost surely, 2^84997578 is an apocalyptic number.

84997578 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84997578 is a wasteful number, since it uses less digits than its factorization.

84997578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14166268.

The product of its digits is 5080320, while the sum is 57.

The square root of 84997578 is about 9219.4131049650. The cubic root of 84997578 is about 439.6787910501.

The spelling of 84997578 in words is "eighty-four million, nine hundred ninety-seven thousand, five hundred seventy-eight".