84509243 has 16 divisors (see below), whose sum is σ = 106229760. Its totient is φ = 65438496.

The previous prime is 84509203. The next prime is 84509263. The reversal of 84509243 is 34290548.

It is a cyclic number.

It is not a de Polignac number, because 84509243 - 2¹⁶ = 84443707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84509203) 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 15 ways as a sum of consecutive naturals, for example, 5603 + ... + 14156.

It is an arithmetic number, because the mean of its divisors is an integer number (6639360).

Almost surely, 2^84509243 is an apocalyptic number.

84509243 is a deficient number, since it is larger than the sum of its proper divisors (21720517).

84509243 is a wasteful number, since it uses less digits than its factorization.

84509243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19826.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 84509243 is about 9192.8908945989. The cubic root of 84509243 is about 438.8351472043.

The spelling of 84509243 in words is "eighty-four million, five hundred nine thousand, two hundred forty-three".