30618961 has 2 divisors, whose sum is σ = 30618962. Its totient is φ = 30618960.

The previous prime is 30618953. The next prime is 30618997. The reversal of 30618961 is 16981603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30041361 + 577600 = 5481^2 + 760^2 .

It is a cyclic number.

It is not a de Polignac number, because 30618961 - 2³ = 30618953 is a prime.

It is not a weakly prime, because it can be changed into another prime (30618941) 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, 15309480 + 15309481.

It is an arithmetic number, because the mean of its divisors is an integer number (15309481).

Almost surely, 2^30618961 is an apocalyptic number.

It is an amenable number.

30618961 is a deficient number, since it is larger than the sum of its proper divisors (1).

30618961 is an equidigital number, since it uses as much as digits as its factorization.

30618961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 30618961 is about 5533.4402499711. The cubic root of 30618961 is about 312.8456710426.

The spelling of 30618961 in words is "thirty million, six hundred eighteen thousand, nine hundred sixty-one".