29300021 has 2 divisors, whose sum is σ = 29300022. Its totient is φ = 29300020.

The previous prime is 29300009. The next prime is 29300023. The reversal of 29300021 is 12000392.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27300625 + 1999396 = 5225^2 + 1414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29300021 is a prime.

It is a Sophie Germain prime.

Together with 29300023, 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 (29300023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14650010 + 14650011.

It is an arithmetic number, because the mean of its divisors is an integer number (14650011).

Almost surely, 2^29300021 is an apocalyptic number.

It is an amenable number.

29300021 is a deficient number, since it is larger than the sum of its proper divisors (1).

29300021 is an equidigital number, since it uses as much as digits as its factorization.

29300021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 29300021 is about 5412.9493808828. The cubic root of 29300021 is about 308.2875434964.

The spelling of 29300021 in words is "twenty-nine million, three hundred thousand, twenty-one".