129237528169 has 2 divisors, whose sum is σ = 129237528170. Its totient is φ = 129237528168.

The previous prime is 129237528137. The next prime is 129237528209. The reversal of 129237528169 is 961825732921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68961386025 + 60276142144 = 262605^2 + 245512^2 .

It is a cyclic number.

It is not a de Polignac number, because 129237528169 - 2⁵ = 129237528137 is a prime.

It is a super-2 number, since 2×129237528169² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129237528109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64618764084 + 64618764085.

It is an arithmetic number, because the mean of its divisors is an integer number (64618764085).

Almost surely, 2^129237528169 is an apocalyptic number.

It is an amenable number.

129237528169 is a deficient number, since it is larger than the sum of its proper divisors (1).

129237528169 is an equidigital number, since it uses as much as digits as its factorization.

129237528169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 55.

The spelling of 129237528169 in words is "one hundred twenty-nine billion, two hundred thirty-seven million, five hundred twenty-eight thousand, one hundred sixty-nine".