84943509 has 48 divisors (see below), whose sum is σ = 146923200. Its totient is φ = 43255296.

The previous prime is 84943493. The next prime is 84943511. The reversal of 84943509 is 90534948.

It is not a de Polignac number, because 84943509 - 2⁴ = 84943493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84943549) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46587 + ... + 48375.

It is an arithmetic number, because the mean of its divisors is an integer number (3060900).

Almost surely, 2^84943509 is an apocalyptic number.

It is an amenable number.

84943509 is a deficient number, since it is larger than the sum of its proper divisors (61979691).

84943509 is a wasteful number, since it uses less digits than its factorization.

84943509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842 (or 1835 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 84943509 is about 9216.4802934743. The cubic root of 84943509 is about 439.5855411962.

The spelling of 84943509 in words is "eighty-four million, nine hundred forty-three thousand, five hundred nine".