29960921 has 2 divisors, whose sum is σ = 29960922. Its totient is φ = 29960920.

The previous prime is 29960897. The next prime is 29960923. The reversal of 29960921 is 12906992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29855296 + 105625 = 5464^2 + 325^2 .

It is a cyclic number.

It is not a de Polignac number, because 29960921 - 2¹⁸ = 29698777 is a prime.

It is a Sophie Germain prime.

Together with 29960923, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (29960923) 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, 14980460 + 14980461.

It is an arithmetic number, because the mean of its divisors is an integer number (14980461).

Almost surely, 2^29960921 is an apocalyptic number.

It is an amenable number.

29960921 is a deficient number, since it is larger than the sum of its proper divisors (1).

29960921 is an equidigital number, since it uses as much as digits as its factorization.

29960921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 29960921 is about 5473.6570042340. The cubic root of 29960921 is about 310.5882724815.

The spelling of 29960921 in words is "twenty-nine million, nine hundred sixty thousand, nine hundred twenty-one".