29917289 has 2 divisors, whose sum is σ = 29917290. Its totient is φ = 29917288.

The previous prime is 29917259. The next prime is 29917291. The reversal of 29917289 is 98271992.

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., 25836889 + 4080400 = 5083^2 + 2020^2 .

It is a cyclic number.

It is not a de Polignac number, because 29917289 - 2⁸ = 29917033 is a prime.

It is a super-2 number, since 2×29917289² = 1790088362219042, which contains 22 as substring.

Together with 29917291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (29917219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14958644 + 14958645.

It is an arithmetic number, because the mean of its divisors is an integer number (14958645).

Almost surely, 2^29917289 is an apocalyptic number.

It is an amenable number.

29917289 is a deficient number, since it is larger than the sum of its proper divisors (1).

29917289 is an equidigital number, since it uses as much as digits as its factorization.

29917289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 47.

The square root of 29917289 is about 5469.6699169145. The cubic root of 29917289 is about 310.4374296418.

The spelling of 29917289 in words is "twenty-nine million, nine hundred seventeen thousand, two hundred eighty-nine".