84845109 has 16 divisors (see below), whose sum is σ = 117319680. Its totient is φ = 54484080.

The previous prime is 84845099. The next prime is 84845129. The reversal of 84845109 is 90154848.

It is not a de Polignac number, because 84845109 - 2⁴ = 84845093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84845129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19102 + ... + 23120.

It is an arithmetic number, because the mean of its divisors is an integer number (7332480).

Almost surely, 2^84845109 is an apocalyptic number.

It is an amenable number.

84845109 is a deficient number, since it is larger than the sum of its proper divisors (32474571).

84845109 is a wasteful number, since it uses less digits than its factorization.

84845109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 84845109 is about 9211.1404831324. The cubic root of 84845109 is about 439.4157344974.

The spelling of 84845109 in words is "eighty-four million, eight hundred forty-five thousand, one hundred nine".