30639073 has 2 divisors, whose sum is σ = 30639074. Its totient is φ = 30639072.

The previous prime is 30639047. The next prime is 30639097. The reversal of 30639073 is 37093603.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27373824 + 3265249 = 5232^2 + 1807^2 .

It is a cyclic number.

It is not a de Polignac number, because 30639073 - 2¹³ = 30630881 is a prime.

It is not a weakly prime, because it can be changed into another prime (30639043) 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, 15319536 + 15319537.

It is an arithmetic number, because the mean of its divisors is an integer number (15319537).

Almost surely, 2^30639073 is an apocalyptic number.

It is an amenable number.

30639073 is a deficient number, since it is larger than the sum of its proper divisors (1).

30639073 is an equidigital number, since it uses as much as digits as its factorization.

30639073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 31.

The square root of 30639073 is about 5535.2572659272. The cubic root of 30639073 is about 312.9141533905.

The spelling of 30639073 in words is "thirty million, six hundred thirty-nine thousand, seventy-three".