30608813 has 2 divisors, whose sum is σ = 30608814. Its totient is φ = 30608812.

The previous prime is 30608803. The next prime is 30608839. The reversal of 30608813 is 31880603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28751044 + 1857769 = 5362^2 + 1363^2 .

It is an emirp because it is prime and its reverse (31880603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30608813 - 2¹⁸ = 30346669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30608803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15304406 + 15304407.

It is an arithmetic number, because the mean of its divisors is an integer number (15304407).

Almost surely, 2^30608813 is an apocalyptic number.

It is an amenable number.

30608813 is a deficient number, since it is larger than the sum of its proper divisors (1).

30608813 is an equidigital number, since it uses as much as digits as its factorization.

30608813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 30608813 is about 5532.5232037471. The cubic root of 30608813 is about 312.8111052206.

The spelling of 30608813 in words is "thirty million, six hundred eight thousand, eight hundred thirteen".