84040243 has 6 divisors (see below), whose sum is σ = 97761156. Its totient is φ = 72034452.

The previous prime is 84040223. The next prime is 84040267. The reversal of 84040243 is 34204048.

It is not a de Polignac number, because 84040243 - 2²¹ = 81943091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84040213) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 857505 + ... + 857602.

It is an arithmetic number, because the mean of its divisors is an integer number (16293526).

Almost surely, 2^84040243 is an apocalyptic number.

84040243 is a deficient number, since it is larger than the sum of its proper divisors (13720913).

84040243 is a wasteful number, since it uses less digits than its factorization.

84040243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715121 (or 1715114 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 84040243 is about 9167.3465626647. The cubic root of 84040243 is about 438.0218413106.

The spelling of 84040243 in words is "eighty-four million, forty thousand, two hundred forty-three".