29983021 has 2 divisors, whose sum is σ = 29983022. Its totient is φ = 29983020.

The previous prime is 29982971. The next prime is 29983043. The reversal of 29983021 is 12038992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29975625 + 7396 = 5475^2 + 86^2 .

It is a cyclic number.

It is not a de Polignac number, because 29983021 - 2¹³ = 29974829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29983721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14991510 + 14991511.

It is an arithmetic number, because the mean of its divisors is an integer number (14991511).

Almost surely, 2^29983021 is an apocalyptic number.

It is an amenable number.

29983021 is a deficient number, since it is larger than the sum of its proper divisors (1).

29983021 is an equidigital number, since it uses as much as digits as its factorization.

29983021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 29983021 is about 5475.6753921320. The cubic root of 29983021 is about 310.6646198655.

The spelling of 29983021 in words is "twenty-nine million, nine hundred eighty-three thousand, twenty-one".