306673397 has 2 divisors, whose sum is σ = 306673398. Its totient is φ = 306673396.

The previous prime is 306673379. The next prime is 306673417. The reversal of 306673397 is 793376603.

Together with previous prime (306673379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157979761 + 148693636 = 12569^2 + 12194^2 .

It is an emirp because it is prime and its reverse (793376603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 306673397 - 2²⁰ = 305624821 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306678397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153336698 + 153336699.

It is an arithmetic number, because the mean of its divisors is an integer number (153336699).

Almost surely, 2^306673397 is an apocalyptic number.

It is an amenable number.

306673397 is a deficient number, since it is larger than the sum of its proper divisors (1).

306673397 is an equidigital number, since it uses as much as digits as its factorization.

306673397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 428652, while the sum is 44.

The square root of 306673397 is about 17512.0928789223. The cubic root of 306673397 is about 674.3603612311.

The spelling of 306673397 in words is "three hundred six million, six hundred seventy-three thousand, three hundred ninety-seven".