129964537239601 has 3 divisors (see below), whose sum is σ = 129964548639801. Its totient is φ = 129964525839402.

The previous prime is 129964537239599. The next prime is 129964537239611. The reversal of 129964537239601 is 106932735469921.

The square root of 129964537239601 is 11400199.

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.

It is not a de Polignac number, because 129964537239601 - 2¹ = 129964537239599 is a prime.

It is a super-3 number, since 3×129964537239601³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129964537239611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5700100 + ... + 17100298.

It is an arithmetic number, because the mean of its divisors is an integer number (43321516213267).

Almost surely, 2^{129964537239601} is an apocalyptic number.

129964537239601 is the 11400199-th square number.

129964537239601 is the 5700100-th centered octagonal number.

It is an amenable number.

129964537239601 is a deficient number, since it is larger than the sum of its proper divisors (11400200).

129964537239601 is an frugal number, since it uses more digits than its factorization.

129964537239601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22800398 (or 11400199 counting only the distinct ones).

The product of its (nonzero) digits is 132269760, while the sum is 67.

The spelling of 129964537239601 in words is "one hundred twenty-nine trillion, nine hundred sixty-four billion, five hundred thirty-seven million, two hundred thirty-nine thousand, six hundred one".