305528813 has 2 divisors, whose sum is σ = 305528814. Its totient is φ = 305528812.

The previous prime is 305528807. The next prime is 305528827. The reversal of 305528813 is 318825503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223861444 + 81667369 = 14962^2 + 9037^2 .

It is an emirp because it is prime and its reverse (318825503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 305528813 - 2²⁶ = 238419949 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 (305528863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152764406 + 152764407.

It is an arithmetic number, because the mean of its divisors is an integer number (152764407).

Almost surely, 2^305528813 is an apocalyptic number.

It is an amenable number.

305528813 is a deficient number, since it is larger than the sum of its proper divisors (1).

305528813 is an equidigital number, since it uses as much as digits as its factorization.

305528813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 305528813 is about 17479.3825119768. The cubic root of 305528813 is about 673.5203532118.

The spelling of 305528813 in words is "three hundred five million, five hundred twenty-eight thousand, eight hundred thirteen".