84497940239 has 4 divisors (see below), whose sum is σ = 84500100960. Its totient is φ = 84495779520.

The previous prime is 84497940223. The next prime is 84497940271. The reversal of 84497940239 is 93204979448.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84497940239 - 2⁴ = 84497940223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84497940739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020599 + ... + 1100280.

It is an arithmetic number, because the mean of its divisors is an integer number (21125025240).

Almost surely, 2^84497940239 is an apocalyptic number.

84497940239 is a deficient number, since it is larger than the sum of its proper divisors (2160721).

84497940239 is a wasteful number, since it uses less digits than its factorization.

84497940239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160720.

The product of its (nonzero) digits is 15676416, while the sum is 59.

The spelling of 84497940239 in words is "eighty-four billion, four hundred ninety-seven million, nine hundred forty thousand, two hundred thirty-nine".