303997 has 2 divisors, whose sum is σ = 303998. Its totient is φ = 303996.

The previous prime is 303983. The next prime is 304009. The reversal of 303997 is 799303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256036 + 47961 = 506^2 + 219^2 .

It is an emirp because it is prime and its reverse (799303) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 303997 - 2¹¹ = 301949 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (303907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151998 + 151999.

It is an arithmetic number, because the mean of its divisors is an integer number (151999).

2³⁰³⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

303997 is a deficient number, since it is larger than the sum of its proper divisors (1).

303997 is an equidigital number, since it uses as much as digits as its factorization.

303997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 31.

The square root of 303997 is about 551.3592295410. The cubic root of 303997 is about 67.2392869527.

It can be divided in two parts, 3039 and 97, that added together give a square (3136 = 56²).

The spelling of 303997 in words is "three hundred three thousand, nine hundred ninety-seven".