129365389 has 2 divisors, whose sum is σ = 129365390. Its totient is φ = 129365388.

The previous prime is 129365351. The next prime is 129365399. The reversal of 129365389 is 983563921.

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., 124144164 + 5221225 = 11142^2 + 2285^2 .

It is a cyclic number.

It is not a de Polignac number, because 129365389 - 2⁷ = 129365261 is a prime.

It is a super-2 number, since 2×129365389² = 33470807742242642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129365309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64682694 + 64682695.

It is an arithmetic number, because the mean of its divisors is an integer number (64682695).

Almost surely, 2^129365389 is an apocalyptic number.

It is an amenable number.

129365389 is a deficient number, since it is larger than the sum of its proper divisors (1).

129365389 is an equidigital number, since it uses as much as digits as its factorization.

129365389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 46.

The square root of 129365389 is about 11373.8906711820. The cubic root of 129365389 is about 505.7540465486.

The spelling of 129365389 in words is "one hundred twenty-nine million, three hundred sixty-five thousand, three hundred eighty-nine".