129712537 has 2 divisors, whose sum is σ = 129712538. Its totient is φ = 129712536.

The previous prime is 129712477. The next prime is 129712577. The reversal of 129712537 is 735217921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87254281 + 42458256 = 9341^2 + 6516^2 .

It is a cyclic number.

It is not a de Polignac number, because 129712537 - 2⁷ = 129712409 is a prime.

It is equal to p_7362883 and since 129712537 and 7362883 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 129712496 and 129712505.

It is not a weakly prime, because it can be changed into another prime (129712577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64856268 + 64856269.

It is an arithmetic number, because the mean of its divisors is an integer number (64856269).

Almost surely, 2^129712537 is an apocalyptic number.

It is an amenable number.

129712537 is a deficient number, since it is larger than the sum of its proper divisors (1).

129712537 is an equidigital number, since it uses as much as digits as its factorization.

129712537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 37.

The square root of 129712537 is about 11389.1411879913. The cubic root of 129712537 is about 506.2060342452.

The spelling of 129712537 in words is "one hundred twenty-nine million, seven hundred twelve thousand, five hundred thirty-seven".