30930521 has 2 divisors, whose sum is σ = 30930522. Its totient is φ = 30930520.

The previous prime is 30930503. The next prime is 30930533. The reversal of 30930521 is 12503903.

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., 30680521 + 250000 = 5539^2 + 500^2 .

It is an emirp because it is prime and its reverse (12503903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30930521 - 2⁶ = 30930457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30930551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15465260 + 15465261.

It is an arithmetic number, because the mean of its divisors is an integer number (15465261).

Almost surely, 2^30930521 is an apocalyptic number.

It is an amenable number.

30930521 is a deficient number, since it is larger than the sum of its proper divisors (1).

30930521 is an equidigital number, since it uses as much as digits as its factorization.

30930521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 30930521 is about 5561.5214644915. The cubic root of 30930521 is about 313.9032015309.

The spelling of 30930521 in words is "thirty million, nine hundred thirty thousand, five hundred twenty-one".