29439281 has 2 divisors, whose sum is σ = 29439282. Its totient is φ = 29439280.

The previous prime is 29439269. The next prime is 29439299. The reversal of 29439281 is 18293492.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20106256 + 9333025 = 4484^2 + 3055^2 .

It is a cyclic number.

It is not a de Polignac number, because 29439281 - 2⁶ = 29439217 is a prime.

It is a super-2 number, since 2×29439281² = 1733342531593922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (29439251) 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, 14719640 + 14719641.

It is an arithmetic number, because the mean of its divisors is an integer number (14719641).

Almost surely, 2^29439281 is an apocalyptic number.

It is an amenable number.

29439281 is a deficient number, since it is larger than the sum of its proper divisors (1).

29439281 is an equidigital number, since it uses as much as digits as its factorization.

29439281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 29439281 is about 5425.7977293666. The cubic root of 29439281 is about 308.7751914406.

The spelling of 29439281 in words is "twenty-nine million, four hundred thirty-nine thousand, two hundred eighty-one".