129237528193 has 4 divisors (see below), whose sum is σ = 129242162500. Its totient is φ = 129232893888.

The previous prime is 129237528169. The next prime is 129237528209. The reversal of 129237528193 is 391825732921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90346532929 + 38890995264 = 300577^2 + 197208^2 .

It is a cyclic number.

It is not a de Polignac number, because 129237528193 - 2¹³ = 129237520001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129237528193.

It is not an unprimeable number, because it can be changed into a prime (129237526193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2275068 + ... + 2331181.

It is an arithmetic number, because the mean of its divisors is an integer number (32310540625).

Almost surely, 2^129237528193 is an apocalyptic number.

It is an amenable number.

129237528193 is a deficient number, since it is larger than the sum of its proper divisors (4634307).

129237528193 is an equidigital number, since it uses as much as digits as its factorization.

129237528193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4634306.

The product of its digits is 1632960, while the sum is 52.

The spelling of 129237528193 in words is "one hundred twenty-nine billion, two hundred thirty-seven million, five hundred twenty-eight thousand, one hundred ninety-three".