129730352761 has 3 divisors (see below), whose sum is σ = 129730712943. Its totient is φ = 129729992580.

The previous prime is 129730352743. The next prime is 129730352809. The reversal of 129730352761 is 167253037921.

The square root of 129730352761 is 360181.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 167253037921 = 16823 ⋅9941927.

It can be written as a sum of positive squares in only one way, i.e., 105150384361 + 24579968400 = 324269^2 + 156780^2 .

It is not a de Polignac number, because 129730352761 - 2¹⁵ = 129730319993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129730352701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 180091 + ... + 540271.

It is an arithmetic number, because the mean of its divisors is an integer number (43243570981).

Almost surely, 2^129730352761 is an apocalyptic number.

129730352761 is the 360181-st square number.

129730352761 is the 180091-st centered octagonal number.

It is an amenable number.

129730352761 is a deficient number, since it is larger than the sum of its proper divisors (360182).

129730352761 is an frugal number, since it uses more digits than its factorization.

129730352761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720362 (or 360181 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 46.

The spelling of 129730352761 in words is "one hundred twenty-nine billion, seven hundred thirty million, three hundred fifty-two thousand, seven hundred sixty-one".