84687945 has 16 divisors (see below), whose sum is σ = 135630720. Its totient is φ = 45123584.

The previous prime is 84687913. The next prime is 84687973. The reversal of 84687945 is 54978648.

It is a cyclic number.

It is not a de Polignac number, because 84687945 - 2⁵ = 84687913 is a prime.

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 in 15 ways as a sum of consecutive naturals, for example, 19132 + ... + 23138.

It is an arithmetic number, because the mean of its divisors is an integer number (8476920).

Almost surely, 2^84687945 is an apocalyptic number.

It is an amenable number.

84687945 is a deficient number, since it is larger than the sum of its proper divisors (50942775).

84687945 is a wasteful number, since it uses less digits than its factorization.

84687945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5424.

The product of its digits is 1935360, while the sum is 51.

The square root of 84687945 is about 9202.6053376204. The cubic root of 84687945 is about 439.1442475456.

The spelling of 84687945 in words is "eighty-four million, six hundred eighty-seven thousand, nine hundred forty-five".