129357901 has 2 divisors, whose sum is σ = 129357902. Its totient is φ = 129357900.

The previous prime is 129357887. The next prime is 129357929. The reversal of 129357901 is 109753921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86769225 + 42588676 = 9315^2 + 6526^2 .

It is a cyclic number.

It is not a de Polignac number, because 129357901 - 2⁵ = 129357869 is a prime.

It is a super-2 number, since 2×129357901² = 33466933102251602, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129357961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64678950 + 64678951.

It is an arithmetic number, because the mean of its divisors is an integer number (64678951).

Almost surely, 2^129357901 is an apocalyptic number.

It is an amenable number.

129357901 is a deficient number, since it is larger than the sum of its proper divisors (1).

129357901 is an equidigital number, since it uses as much as digits as its factorization.

129357901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 129357901 is about 11373.5614914590. The cubic root of 129357901 is about 505.7442882472.

The spelling of 129357901 in words is "one hundred twenty-nine million, three hundred fifty-seven thousand, nine hundred one".