994559780393 has 2 divisors, whose sum is σ = 994559780394. Its totient is φ = 994559780392.

The previous prime is 994559780339. The next prime is 994559780443. The reversal of 994559780393 is 393087955499.

Together with previous prime (994559780339) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 963522854464 + 31036925929 = 981592^2 + 176173^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-994559780393 is a prime.

It is not a weakly prime, because it can be changed into another prime (994559780293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497279890196 + 497279890197.

It is an arithmetic number, because the mean of its divisors is an integer number (497279890197).

Almost surely, 2^994559780393 is an apocalyptic number.

It is an amenable number.

994559780393 is a deficient number, since it is larger than the sum of its proper divisors (1).

994559780393 is an equidigital number, since it uses as much as digits as its factorization.

994559780393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 330674400, while the sum is 71.

The spelling of 994559780393 in words is "nine hundred ninety-four billion, five hundred fifty-nine million, seven hundred eighty thousand, three hundred ninety-three".