84183993 has 6 divisors (see below), whose sum is σ = 121599114. Its totient is φ = 56122656.

The previous prime is 84183977. The next prime is 84183997. The reversal of 84183993 is 39938148.

It can be written as a sum of positive squares in only one way, i.e., 84052224 + 131769 = 9168^2 + 363^2 .

It is not a de Polignac number, because 84183993 - 2⁴ = 84183977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84183997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4676880 + ... + 4676897.

It is an arithmetic number, because the mean of its divisors is an integer number (20266519).

Almost surely, 2^84183993 is an apocalyptic number.

It is an amenable number.

84183993 is a deficient number, since it is larger than the sum of its proper divisors (37415121).

84183993 is a wasteful number, since it uses less digits than its factorization.

84183993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9353783 (or 9353780 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 84183993 is about 9175.1835403985. The cubic root of 84183993 is about 438.2714430522.

The spelling of 84183993 in words is "eighty-four million, one hundred eighty-three thousand, nine hundred ninety-three".