29121143 has 2 divisors, whose sum is σ = 29121144. Its totient is φ = 29121142.

The previous prime is 29121137. The next prime is 29121173. The reversal of 29121143 is 34112192.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 29121143 - 2¹² = 29117047 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29121173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14560571 + 14560572.

It is an arithmetic number, because the mean of its divisors is an integer number (14560572).

Almost surely, 2^29121143 is an apocalyptic number.

29121143 is a deficient number, since it is larger than the sum of its proper divisors (1).

29121143 is an equidigital number, since it uses as much as digits as its factorization.

29121143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

The square root of 29121143 is about 5396.4009302497. The cubic root of 29121143 is about 307.6588924786.

The spelling of 29121143 in words is "twenty-nine million, one hundred twenty-one thousand, one hundred forty-three".