306606121 has 2 divisors, whose sum is σ = 306606122. Its totient is φ = 306606120.

The previous prime is 306606103. The next prime is 306606133. The reversal of 306606121 is 121606603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277056025 + 29550096 = 16645^2 + 5436^2 .

It is a cyclic number.

It is not a de Polignac number, because 306606121 - 2⁷ = 306605993 is a prime.

It is not a weakly prime, because it can be changed into another prime (306600121) 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, 153303060 + 153303061.

It is an arithmetic number, because the mean of its divisors is an integer number (153303061).

Almost surely, 2^306606121 is an apocalyptic number.

It is an amenable number.

306606121 is a deficient number, since it is larger than the sum of its proper divisors (1).

306606121 is an equidigital number, since it uses as much as digits as its factorization.

306606121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 306606121 is about 17510.1719294814. The cubic root of 306606121 is about 674.3110453725.

The spelling of 306606121 in words is "three hundred six million, six hundred six thousand, one hundred twenty-one".