129516157 has 2 divisors, whose sum is σ = 129516158. Its totient is φ = 129516156.

The previous prime is 129516143. The next prime is 129516181. The reversal of 129516157 is 751615921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104325796 + 25190361 = 10214^2 + 5019^2 .

It is a cyclic number.

It is not a de Polignac number, because 129516157 - 2⁷ = 129516029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129516137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64758078 + 64758079.

It is an arithmetic number, because the mean of its divisors is an integer number (64758079).

Almost surely, 2^129516157 is an apocalyptic number.

It is an amenable number.

129516157 is a deficient number, since it is larger than the sum of its proper divisors (1).

129516157 is an equidigital number, since it uses as much as digits as its factorization.

129516157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 37.

The square root of 129516157 is about 11380.5165524241. The cubic root of 129516157 is about 505.9504461255.

The spelling of 129516157 in words is "one hundred twenty-nine million, five hundred sixteen thousand, one hundred fifty-seven".