84709845 has 24 divisors (see below), whose sum is σ = 160179552. Its totient is φ = 41071200.

The previous prime is 84709843. The next prime is 84709853. The reversal of 84709845 is 54890748.

It is not a de Polignac number, because 84709845 - 2¹ = 84709843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 84709845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84709843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85071 + ... + 86060.

It is an arithmetic number, because the mean of its divisors is an integer number (6674148).

Almost surely, 2^84709845 is an apocalyptic number.

It is an amenable number.

84709845 is a deficient number, since it is larger than the sum of its proper divisors (75469707).

84709845 is a wasteful number, since it uses less digits than its factorization.

84709845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171153 (or 171150 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 84709845 is about 9203.7951411361. The cubic root of 84709845 is about 439.1820979943.

The spelling of 84709845 in words is "eighty-four million, seven hundred nine thousand, eight hundred forty-five".