303242993 has 2 divisors, whose sum is σ = 303242994. Its totient is φ = 303242992.

The previous prime is 303242981. The next prime is 303243019. The reversal of 303242993 is 399242303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199854769 + 103388224 = 14137^2 + 10168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-303242993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (303242903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151621496 + 151621497.

It is an arithmetic number, because the mean of its divisors is an integer number (151621497).

Almost surely, 2^303242993 is an apocalyptic number.

It is an amenable number.

303242993 is a deficient number, since it is larger than the sum of its proper divisors (1).

303242993 is an equidigital number, since it uses as much as digits as its factorization.

303242993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 303242993 is about 17413.8735782709. The cubic root of 303242993 is about 671.8364948779.

The spelling of 303242993 in words is "three hundred three million, two hundred forty-two thousand, nine hundred ninety-three".