30649 has 2 divisors, whose sum is σ = 30650. Its totient is φ = 30648.

The previous prime is 30643. The next prime is 30661. The reversal of 30649 is 94603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17424 + 13225 = 132^2 + 115^2 .

It is an emirp because it is prime and its reverse (94603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30649 - 2⁹ = 30137 is a prime.

It is a super-2 number, since 2×30649² = 1878722402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15324 + 15325.

It is an arithmetic number, because the mean of its divisors is an integer number (15325).

2³⁰⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

30649 is a deficient number, since it is larger than the sum of its proper divisors (1).

30649 is an equidigital number, since it uses as much as digits as its factorization.

30649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 30649 is about 175.0685579994. The cubic root of 30649 is about 31.2947944267.

The spelling of 30649 in words is "thirty thousand, six hundred forty-nine".