29121329 has 2 divisors, whose sum is σ = 29121330. Its totient is φ = 29121328.

The previous prime is 29121299. The next prime is 29121353. The reversal of 29121329 is 92312192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21641104 + 7480225 = 4652^2 + 2735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29121329 is a prime.

It is not a weakly prime, because it can be changed into another prime (29121359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14560664 + 14560665.

It is an arithmetic number, because the mean of its divisors is an integer number (14560665).

Almost surely, 2^29121329 is an apocalyptic number.

It is an amenable number.

29121329 is a deficient number, since it is larger than the sum of its proper divisors (1).

29121329 is an equidigital number, since it uses as much as digits as its factorization.

29121329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 29.

The square root of 29121329 is about 5396.4181639306. The cubic root of 29121329 is about 307.6595474945.

The spelling of 29121329 in words is "twenty-nine million, one hundred twenty-one thousand, three hundred twenty-nine".