129465709 has 2 divisors, whose sum is σ = 129465710. Its totient is φ = 129465708.

The previous prime is 129465691. The next prime is 129465737. The reversal of 129465709 is 907564921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91298025 + 38167684 = 9555^2 + 6178^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129465709 is a prime.

It is a super-2 number, since 2×129465709² = 33522739613745362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129465779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64732854 + 64732855.

It is an arithmetic number, because the mean of its divisors is an integer number (64732855).

Almost surely, 2^129465709 is an apocalyptic number.

It is an amenable number.

129465709 is a deficient number, since it is larger than the sum of its proper divisors (1).

129465709 is an equidigital number, since it uses as much as digits as its factorization.

129465709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 129465709 is about 11378.2999169472. The cubic root of 129465709 is about 505.8847464645.

The spelling of 129465709 in words is "one hundred twenty-nine million, four hundred sixty-five thousand, seven hundred nine".