993799649 has 2 divisors, whose sum is σ = 993799650. Its totient is φ = 993799648.

The previous prime is 993799633. The next prime is 993799657. The reversal of 993799649 is 946997399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 855972049 + 137827600 = 29257^2 + 11740^2 .

It is an emirp because it is prime and its reverse (946997399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 993799649 - 2⁴ = 993799633 is a prime.

It is not a weakly prime, because it can be changed into another prime (993799679) 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, 496899824 + 496899825.

It is an arithmetic number, because the mean of its divisors is an integer number (496899825).

Almost surely, 2^993799649 is an apocalyptic number.

It is an amenable number.

993799649 is a deficient number, since it is larger than the sum of its proper divisors (1).

993799649 is an equidigital number, since it uses as much as digits as its factorization.

993799649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29760696, while the sum is 65.

The square root of 993799649 is about 31524.5880068241. The cubic root of 993799649 is about 997.9289299634.

The spelling of 993799649 in words is "nine hundred ninety-three million, seven hundred ninety-nine thousand, six hundred forty-nine".