29105389 has 2 divisors, whose sum is σ = 29105390. Its totient is φ = 29105388.

The previous prime is 29105387. The next prime is 29105399. The reversal of 29105389 is 98350192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16467364 + 12638025 = 4058^2 + 3555^2 .

It is a cyclic number.

It is not a de Polignac number, because 29105389 - 2¹ = 29105387 is a prime.

Together with 29105387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29105383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14552694 + 14552695.

It is an arithmetic number, because the mean of its divisors is an integer number (14552695).

Almost surely, 2^29105389 is an apocalyptic number.

It is an amenable number.

29105389 is a deficient number, since it is larger than the sum of its proper divisors (1).

29105389 is an equidigital number, since it uses as much as digits as its factorization.

29105389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 29105389 is about 5394.9410562118. The cubic root of 29105389 is about 307.6034032135.

The spelling of 29105389 in words is "twenty-nine million, one hundred five thousand, three hundred eighty-nine".