993556243 has 2 divisors, whose sum is σ = 993556244. Its totient is φ = 993556242.

The previous prime is 993556183. The next prime is 993556331. The reversal of 993556243 is 342655399.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 993556243 - 2¹⁷ = 993425171 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 993556193 and 993556202.

It is not a weakly prime, because it can be changed into another prime (993556843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496778121 + 496778122.

It is an arithmetic number, because the mean of its divisors is an integer number (496778122).

Almost surely, 2^993556243 is an apocalyptic number.

993556243 is a deficient number, since it is larger than the sum of its proper divisors (1).

993556243 is an equidigital number, since it uses as much as digits as its factorization.

993556243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 874800, while the sum is 46.

The square root of 993556243 is about 31520.7271965607. The cubic root of 993556243 is about 997.8474508568.

The spelling of 993556243 in words is "nine hundred ninety-three million, five hundred fifty-six thousand, two hundred forty-three".