84242993 has 4 divisors (see below), whose sum is σ = 85309440. Its totient is φ = 83176548.

The previous prime is 84242981. The next prime is 84243001. The reversal of 84242993 is 39924248.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84242993 - 2⁶ = 84242929 is a prime.

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 84242993.

It is not an unprimeable number, because it can be changed into a prime (84242953) 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 3 ways as a sum of consecutive naturals, for example, 533105 + ... + 533262.

It is an arithmetic number, because the mean of its divisors is an integer number (21327360).

Almost surely, 2^84242993 is an apocalyptic number.

It is an amenable number.

84242993 is a deficient number, since it is larger than the sum of its proper divisors (1066447).

84242993 is a wasteful number, since it uses less digits than its factorization.

84242993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066446.

The product of its digits is 124416, while the sum is 41.

The square root of 84242993 is about 9178.3981717945. The cubic root of 84242993 is about 438.3738060460.

The spelling of 84242993 in words is "eighty-four million, two hundred forty-two thousand, nine hundred ninety-three".