30359921 has 2 divisors, whose sum is σ = 30359922. Its totient is φ = 30359920.

The previous prime is 30359887. The next prime is 30359941. The reversal of 30359921 is 12995303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29430625 + 929296 = 5425^2 + 964^2 .

It is a cyclic number.

It is not a de Polignac number, because 30359921 - 2¹⁰ = 30358897 is a prime.

It is not a weakly prime, because it can be changed into another prime (30359941) 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, 15179960 + 15179961.

It is an arithmetic number, because the mean of its divisors is an integer number (15179961).

Almost surely, 2^30359921 is an apocalyptic number.

It is an amenable number.

30359921 is a deficient number, since it is larger than the sum of its proper divisors (1).

30359921 is an equidigital number, since it uses as much as digits as its factorization.

30359921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 30359921 is about 5509.9837567819. The cubic root of 30359921 is about 311.9609343209.

The spelling of 30359921 in words is "thirty million, three hundred fifty-nine thousand, nine hundred twenty-one".