306900397 has 2 divisors, whose sum is σ = 306900398. Its totient is φ = 306900396.

The previous prime is 306900389. The next prime is 306900427. The reversal of 306900397 is 793009603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153611236 + 153289161 = 12394^2 + 12381^2 .

It is an emirp because it is prime and its reverse (793009603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 306900397 - 2³ = 306900389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306900197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153450198 + 153450199.

It is an arithmetic number, because the mean of its divisors is an integer number (153450199).

Almost surely, 2^306900397 is an apocalyptic number.

It is an amenable number.

306900397 is a deficient number, since it is larger than the sum of its proper divisors (1).

306900397 is an equidigital number, since it uses as much as digits as its factorization.

306900397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 37.

The square root of 306900397 is about 17518.5729156230. The cubic root of 306900397 is about 674.5267076320.

The spelling of 306900397 in words is "three hundred six million, nine hundred thousand, three hundred ninety-seven".