84432309 has 16 divisors (see below), whose sum is σ = 122375232. Its totient is φ = 51470208.

The previous prime is 84432307. The next prime is 84432323. The reversal of 84432309 is 90323448.

It is not a de Polignac number, because 84432309 - 2¹ = 84432307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84432309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84432301) 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, 5944 + ... + 14289.

It is an arithmetic number, because the mean of its divisors is an integer number (7648452).

Almost surely, 2^84432309 is an apocalyptic number.

It is an amenable number.

84432309 is a deficient number, since it is larger than the sum of its proper divisors (37942923).

84432309 is a wasteful number, since it uses less digits than its factorization.

84432309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20356.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 84432309 is about 9188.7055127477. The cubic root of 84432309 is about 438.7019404993.

It can be divided in two parts, 844 and 32309, that added together give a triangular number (33153 = T₂₅₇).

The spelling of 84432309 in words is "eighty-four million, four hundred thirty-two thousand, three hundred nine".