84493243819 has 4 divisors (see below), whose sum is σ = 84494979400. Its totient is φ = 84491508240.

The previous prime is 84493243801. The next prime is 84493243823. The reversal of 84493243819 is 91834239448.

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 84493243819 - 2¹⁵ = 84493211051 is a prime.

It is a super-2 number, since 2×84493243819² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84493243819.

It is not an unprimeable number, because it can be changed into a prime (84493243019) 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, 792594 + ... + 892855.

It is an arithmetic number, because the mean of its divisors is an integer number (21123744850).

Almost surely, 2^84493243819 is an apocalyptic number.

84493243819 is a deficient number, since it is larger than the sum of its proper divisors (1735581).

84493243819 is a wasteful number, since it uses less digits than its factorization.

84493243819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735580.

The product of its digits is 5971968, while the sum is 55.

The spelling of 84493243819 in words is "eighty-four billion, four hundred ninety-three million, two hundred forty-three thousand, eight hundred nineteen".