30638953 has 2 divisors, whose sum is σ = 30638954. Its totient is φ = 30638952.

The previous prime is 30638941. The next prime is 30638969. The reversal of 30638953 is 35983603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30503529 + 135424 = 5523^2 + 368^2 .

It is a cyclic number.

It is not a de Polignac number, because 30638953 - 2⁹ = 30638441 is a prime.

It is not a weakly prime, because it can be changed into another prime (30638983) 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, 15319476 + 15319477.

It is an arithmetic number, because the mean of its divisors is an integer number (15319477).

Almost surely, 2^30638953 is an apocalyptic number.

It is an amenable number.

30638953 is a deficient number, since it is larger than the sum of its proper divisors (1).

30638953 is an equidigital number, since it uses as much as digits as its factorization.

30638953 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 37.

The square root of 30638953 is about 5535.2464263120. The cubic root of 30638953 is about 312.9137448735.

The spelling of 30638953 in words is "thirty million, six hundred thirty-eight thousand, nine hundred fifty-three".