306352421 has 2 divisors, whose sum is σ = 306352422. Its totient is φ = 306352420.

The previous prime is 306352411. The next prime is 306352429. The reversal of 306352421 is 124253603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235960321 + 70392100 = 15361^2 + 8390^2 .

It is a cyclic number.

It is not a de Polignac number, because 306352421 - 2⁶ = 306352357 is a prime.

It is a super-2 number, since 2×306352421² = 187703611705122482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306352429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153176210 + 153176211.

It is an arithmetic number, because the mean of its divisors is an integer number (153176211).

Almost surely, 2^306352421 is an apocalyptic number.

It is an amenable number.

306352421 is a deficient number, since it is larger than the sum of its proper divisors (1).

306352421 is an equidigital number, since it uses as much as digits as its factorization.

306352421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 306352421 is about 17502.9260696605. The cubic root of 306352421 is about 674.1250087318.

The spelling of 306352421 in words is "three hundred six million, three hundred fifty-two thousand, four hundred twenty-one".