30316813 has 2 divisors, whose sum is σ = 30316814. Its totient is φ = 30316812.

The previous prime is 30316757. The next prime is 30316841. The reversal of 30316813 is 31861303.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26081449 + 4235364 = 5107^2 + 2058^2 .

It is a cyclic number.

It is not a de Polignac number, because 30316813 - 2²¹ = 28219661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30316213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15158406 + 15158407.

It is an arithmetic number, because the mean of its divisors is an integer number (15158407).

Almost surely, 2^30316813 is an apocalyptic number.

It is an amenable number.

30316813 is a deficient number, since it is larger than the sum of its proper divisors (1).

30316813 is an equidigital number, since it uses as much as digits as its factorization.

30316813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30316813 is about 5506.0705589377. The cubic root of 30316813 is about 311.8132134499.

The spelling of 30316813 in words is "thirty million, three hundred sixteen thousand, eight hundred thirteen".