30648661 has 2 divisors, whose sum is σ = 30648662. Its totient is φ = 30648660.

The previous prime is 30648623. The next prime is 30648697. The reversal of 30648661 is 16684603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28826161 + 1822500 = 5369^2 + 1350^2 .

It is a cyclic number.

It is not a de Polignac number, because 30648661 - 2¹³ = 30640469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30648061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15324330 + 15324331.

It is an arithmetic number, because the mean of its divisors is an integer number (15324331).

Almost surely, 2^30648661 is an apocalyptic number.

It is an amenable number.

30648661 is a deficient number, since it is larger than the sum of its proper divisors (1).

30648661 is an equidigital number, since it uses as much as digits as its factorization.

30648661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 30648661 is about 5536.1232825868. The cubic root of 30648661 is about 312.9467904528.

The spelling of 30648661 in words is "thirty million, six hundred forty-eight thousand, six hundred sixty-one".