30621939529 has 2 divisors, whose sum is σ = 30621939530. Its totient is φ = 30621939528.

The previous prime is 30621939511. The next prime is 30621939587. The reversal of 30621939529 is 92593912603.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28804878400 + 1817061129 = 169720^2 + 42627^2 .

It is a cyclic number.

It is not a de Polignac number, because 30621939529 - 2²¹ = 30619842377 is a prime.

It is not a weakly prime, because it can be changed into another prime (30621939629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15310969764 + 15310969765.

It is an arithmetic number, because the mean of its divisors is an integer number (15310969765).

Almost surely, 2^30621939529 is an apocalyptic number.

It is an amenable number.

30621939529 is a deficient number, since it is larger than the sum of its proper divisors (1).

30621939529 is an equidigital number, since it uses as much as digits as its factorization.

30621939529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 787320, while the sum is 49.

The spelling of 30621939529 in words is "thirty billion, six hundred twenty-one million, nine hundred thirty-nine thousand, five hundred twenty-nine".