303034421 has 2 divisors, whose sum is σ = 303034422. Its totient is φ = 303034420.

The previous prime is 303034387. The next prime is 303034423. The reversal of 303034421 is 124430303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179935396 + 123099025 = 13414^2 + 11095^2 .

It is an emirp because it is prime and its reverse (124430303) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 303034421 - 2²² = 298840117 is a prime.

Together with 303034423, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 303034393 and 303034402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (303034423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151517210 + 151517211.

It is an arithmetic number, because the mean of its divisors is an integer number (151517211).

Almost surely, 2^303034421 is an apocalyptic number.

It is an amenable number.

303034421 is a deficient number, since it is larger than the sum of its proper divisors (1).

303034421 is an equidigital number, since it uses as much as digits as its factorization.

303034421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 303034421 is about 17407.8838748425. The cubic root of 303034421 is about 671.6824287511.

Adding to 303034421 its reverse (124430303), we get a palindrome (427464724).

The spelling of 303034421 in words is "three hundred three million, thirty-four thousand, four hundred twenty-one".