30646409 has 2 divisors, whose sum is σ = 30646410. Its totient is φ = 30646408.

The previous prime is 30646387. The next prime is 30646457. The reversal of 30646409 is 90464603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24255625 + 6390784 = 4925^2 + 2528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30646409 is a prime.

It is not a weakly prime, because it can be changed into another prime (30616409) 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, 15323204 + 15323205.

It is an arithmetic number, because the mean of its divisors is an integer number (15323205).

Almost surely, 2^30646409 is an apocalyptic number.

It is an amenable number.

30646409 is a deficient number, since it is larger than the sum of its proper divisors (1).

30646409 is an equidigital number, since it uses as much as digits as its factorization.

30646409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 30646409 is about 5535.9198874261. The cubic root of 30646409 is about 312.9391253715.

The spelling of 30646409 in words is "thirty million, six hundred forty-six thousand, four hundred nine".