306677213 has 2 divisors, whose sum is σ = 306677214. Its totient is φ = 306677212.

The previous prime is 306677197. The next prime is 306677249. The reversal of 306677213 is 312776603.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 270701209 + 35976004 = 16453^2 + 5998^2 .

It is a cyclic number.

It is not a de Polignac number, because 306677213 - 2⁴ = 306677197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306677113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153338606 + 153338607.

It is an arithmetic number, because the mean of its divisors is an integer number (153338607).

Almost surely, 2^306677213 is an apocalyptic number.

It is an amenable number.

306677213 is a deficient number, since it is larger than the sum of its proper divisors (1).

306677213 is an equidigital number, since it uses as much as digits as its factorization.

306677213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 306677213 is about 17512.2018318657. The cubic root of 306677213 is about 674.3631582876.

The spelling of 306677213 in words is "three hundred six million, six hundred seventy-seven thousand, two hundred thirteen".