30648613 has 4 divisors (see below), whose sum is σ = 30669228. Its totient is φ = 30628000.

The previous prime is 30648589. The next prime is 30648619. The reversal of 30648613 is 31684603.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11437924 + 19210689 = 3382^2 + 4383^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30648613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30648619) 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 in 3 ways as a sum of consecutive naturals, for example, 7888 + ... + 11113.

It is an arithmetic number, because the mean of its divisors is an integer number (7667307).

Almost surely, 2^30648613 is an apocalyptic number.

It is an amenable number.

30648613 is a deficient number, since it is larger than the sum of its proper divisors (20615).

30648613 is a wasteful number, since it uses less digits than its factorization.

30648613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20614.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 30648613 is about 5536.1189474216. The cubic root of 30648613 is about 312.9466270802.

The spelling of 30648613 in words is "thirty million, six hundred forty-eight thousand, six hundred thirteen".