29391389 has 2 divisors, whose sum is σ = 29391390. Its totient is φ = 29391388.

The previous prime is 29391377. The next prime is 29391407. The reversal of 29391389 is 98319392.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16467364 + 12924025 = 4058^2 + 3595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29391389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29399389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14695694 + 14695695.

It is an arithmetic number, because the mean of its divisors is an integer number (14695695).

Almost surely, 2^29391389 is an apocalyptic number.

It is an amenable number.

29391389 is a deficient number, since it is larger than the sum of its proper divisors (1).

29391389 is an equidigital number, since it uses as much as digits as its factorization.

29391389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 44.

The square root of 29391389 is about 5421.3825727392. The cubic root of 29391389 is about 308.6076614465.

The spelling of 29391389 in words is "twenty-nine million, three hundred ninety-one thousand, three hundred eighty-nine".