993243854279 has 2 divisors, whose sum is σ = 993243854280. Its totient is φ = 993243854278.

The previous prime is 993243854231. The next prime is 993243854297. The reversal of 993243854279 is 972458342399.

Together with next prime (993243854297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 993243854279 - 2²⁰ = 993242805703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993243854209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496621927139 + 496621927140.

It is an arithmetic number, because the mean of its divisors is an integer number (496621927140).

Almost surely, 2^993243854279 is an apocalyptic number.

993243854279 is a deficient number, since it is larger than the sum of its proper divisors (1).

993243854279 is an equidigital number, since it uses as much as digits as its factorization.

993243854279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117573120, while the sum is 65.

The spelling of 993243854279 in words is "nine hundred ninety-three billion, two hundred forty-three million, eight hundred fifty-four thousand, two hundred seventy-nine".