129349399 has 2 divisors, whose sum is σ = 129349400. Its totient is φ = 129349398.

The previous prime is 129349393. The next prime is 129349421. The reversal of 129349399 is 993943921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129349399 - 2⁷ = 129349271 is a prime.

It is a super-2 number, since 2×129349399² = 33462534043322402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129349393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64674699 + 64674700.

It is an arithmetic number, because the mean of its divisors is an integer number (64674700).

Almost surely, 2^129349399 is an apocalyptic number.

129349399 is a deficient number, since it is larger than the sum of its proper divisors (1).

129349399 is an equidigital number, since it uses as much as digits as its factorization.

129349399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 472392, while the sum is 49.

The square root of 129349399 is about 11373.1877237650. The cubic root of 129349399 is about 505.7332080526.

The spelling of 129349399 in words is "one hundred twenty-nine million, three hundred forty-nine thousand, three hundred ninety-nine".