30925649 has 2 divisors, whose sum is σ = 30925650. Its totient is φ = 30925648.

The previous prime is 30925621. The next prime is 30925663. The reversal of 30925649 is 94652903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29235649 + 1690000 = 5407^2 + 1300^2 .

It is an emirp because it is prime and its reverse (94652903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30925649 - 2⁸ = 30925393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30925619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15462824 + 15462825.

It is an arithmetic number, because the mean of its divisors is an integer number (15462825).

Almost surely, 2^30925649 is an apocalyptic number.

It is an amenable number.

30925649 is a deficient number, since it is larger than the sum of its proper divisors (1).

30925649 is an equidigital number, since it uses as much as digits as its factorization.

30925649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 30925649 is about 5561.0834376046. The cubic root of 30925649 is about 313.8867192490.

The spelling of 30925649 in words is "thirty million, nine hundred twenty-five thousand, six hundred forty-nine".