30521939429 has 2 divisors, whose sum is σ = 30521939430. Its totient is φ = 30521939428.

The previous prime is 30521939411. The next prime is 30521939431. The reversal of 30521939429 is 92493912503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19917676900 + 10604262529 = 141130^2 + 102977^2 .

It is a cyclic number.

It is not a de Polignac number, because 30521939429 - 2¹² = 30521935333 is a prime.

It is a Sophie Germain prime.

Together with 30521939431, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30521939489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15260969714 + 15260969715.

It is an arithmetic number, because the mean of its divisors is an integer number (15260969715).

Almost surely, 2^30521939429 is an apocalyptic number.

It is an amenable number.

30521939429 is a deficient number, since it is larger than the sum of its proper divisors (1).

30521939429 is an equidigital number, since it uses as much as digits as its factorization.

30521939429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 47.

The spelling of 30521939429 in words is "thirty billion, five hundred twenty-one million, nine hundred thirty-nine thousand, four hundred twenty-nine".