29459921 has 2 divisors, whose sum is σ = 29459922. Its totient is φ = 29459920.

The previous prime is 29459909. The next prime is 29459923. The reversal of 29459921 is 12995492.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29376400 + 83521 = 5420^2 + 289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29459921 is a prime.

It is a Sophie Germain prime.

Together with 29459923, 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 (29459923) 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, 14729960 + 14729961.

It is an arithmetic number, because the mean of its divisors is an integer number (14729961).

Almost surely, 2^29459921 is an apocalyptic number.

It is an amenable number.

29459921 is a deficient number, since it is larger than the sum of its proper divisors (1).

29459921 is an equidigital number, since it uses as much as digits as its factorization.

29459921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 41.

The square root of 29459921 is about 5427.6994205648. The cubic root of 29459921 is about 308.8473357651.

The spelling of 29459921 in words is "twenty-nine million, four hundred fifty-nine thousand, nine hundred twenty-one".