29642021 has 2 divisors, whose sum is σ = 29642022. Its totient is φ = 29642020.

The previous prime is 29642017. The next prime is 29642023. The reversal of 29642021 is 12024692.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29311396 + 330625 = 5414^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 29642021 - 2² = 29642017 is a prime.

Together with 29642023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29642023) 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, 14821010 + 14821011.

It is an arithmetic number, because the mean of its divisors is an integer number (14821011).

Almost surely, 2^29642021 is an apocalyptic number.

It is an amenable number.

29642021 is a deficient number, since it is larger than the sum of its proper divisors (1).

29642021 is an equidigital number, since it uses as much as digits as its factorization.

29642021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 29642021 is about 5444.4486405880. The cubic root of 29642021 is about 309.4823862970.

The spelling of 29642021 in words is "twenty-nine million, six hundred forty-two thousand, twenty-one".