29309389 has 2 divisors, whose sum is σ = 29309390. Its totient is φ = 29309388.

The previous prime is 29309363. The next prime is 29309407. The reversal of 29309389 is 98390392.

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., 25857225 + 3452164 = 5085^2 + 1858^2 .

It is a cyclic number.

It is not a de Polignac number, because 29309389 - 2¹³ = 29301197 is a prime.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29303389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14654694 + 14654695.

It is an arithmetic number, because the mean of its divisors is an integer number (14654695).

Almost surely, 2^29309389 is an apocalyptic number.

It is an amenable number.

29309389 is a deficient number, since it is larger than the sum of its proper divisors (1).

29309389 is an equidigital number, since it uses as much as digits as its factorization.

29309389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 29309389 is about 5413.8146440380. The cubic root of 29309389 is about 308.3203959185.

The spelling of 29309389 in words is "twenty-nine million, three hundred nine thousand, three hundred eighty-nine".