29943139 has 2 divisors, whose sum is σ = 29943140. Its totient is φ = 29943138.

The previous prime is 29943127. The next prime is 29943143. The reversal of 29943139 is 93134992.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 29943139 - 2¹¹ = 29941091 is a prime.

It is not a weakly prime, because it can be changed into another prime (29943119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14971569 + 14971570.

It is an arithmetic number, because the mean of its divisors is an integer number (14971570).

Almost surely, 2^29943139 is an apocalyptic number.

29943139 is a deficient number, since it is larger than the sum of its proper divisors (1).

29943139 is an equidigital number, since it uses as much as digits as its factorization.

29943139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 40.

The square root of 29943139 is about 5472.0324377694. The cubic root of 29943139 is about 310.5268149400.

The spelling of 29943139 in words is "twenty-nine million, nine hundred forty-three thousand, one hundred thirty-nine".