84399639243 has 4 divisors (see below), whose sum is σ = 112532852328. Its totient is φ = 56266426160.

The previous prime is 84399639229. The next prime is 84399639251. The reversal of 84399639243 is 34293699348.

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 84399639243 - 2⁶ = 84399639179 is a prime.

It is a super-2 number, since 2×84399639243² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84399639283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14066606538 + ... + 14066606543.

It is an arithmetic number, because the mean of its divisors is an integer number (28133213082).

Almost surely, 2^84399639243 is an apocalyptic number.

84399639243 is a deficient number, since it is larger than the sum of its proper divisors (28133213085).

84399639243 is a wasteful number, since it uses less digits than its factorization.

84399639243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28133213084.

The product of its digits is 30233088, while the sum is 60.

The spelling of 84399639243 in words is "eighty-four billion, three hundred ninety-nine million, six hundred thirty-nine thousand, two hundred forty-three".