30820313 has 2 divisors, whose sum is σ = 30820314. Its totient is φ = 30820312.

The previous prime is 30820277. The next prime is 30820369. The reversal of 30820313 is 31302803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24127744 + 6692569 = 4912^2 + 2587^2 .

It is a cyclic number.

It is not a de Polignac number, because 30820313 - 2⁸ = 30820057 is a prime.

It is not a weakly prime, because it can be changed into another prime (30820373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15410156 + 15410157.

It is an arithmetic number, because the mean of its divisors is an integer number (15410157).

Almost surely, 2^30820313 is an apocalyptic number.

It is an amenable number.

30820313 is a deficient number, since it is larger than the sum of its proper divisors (1).

30820313 is an equidigital number, since it uses as much as digits as its factorization.

30820313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 30820313 is about 5551.6045428326. The cubic root of 30820313 is about 313.5299368471.

The spelling of 30820313 in words is "thirty million, eight hundred twenty thousand, three hundred thirteen".