306485513 has 2 divisors, whose sum is σ = 306485514. Its totient is φ = 306485512.

The previous prime is 306485497. The next prime is 306485519. The reversal of 306485513 is 315584603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216766729 + 89718784 = 14723^2 + 9472^2 .

It is an emirp because it is prime and its reverse (315584603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 306485513 - 2⁴ = 306485497 is a prime.

It is a zygodrome in base 8.

It is not a weakly prime, because it can be changed into another prime (306485519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153242756 + 153242757.

It is an arithmetic number, because the mean of its divisors is an integer number (153242757).

Almost surely, 2^306485513 is an apocalyptic number.

It is an amenable number.

306485513 is a deficient number, since it is larger than the sum of its proper divisors (1).

306485513 is an equidigital number, since it uses as much as digits as its factorization.

306485513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 306485513 is about 17506.7276496780. The cubic root of 306485513 is about 674.2226170742. Note that the first 3 decimals are identical.

The spelling of 306485513 in words is "three hundred six million, four hundred eighty-five thousand, five hundred thirteen".