129752073 has 12 divisors (see below), whose sum is σ = 204457968. Its totient is φ = 78637560.

The previous prime is 129752059. The next prime is 129752089. The reversal of 129752073 is 370257921.

129752073 is a `hidden beast` number, since 129 + 7 + 520 + 7 + 3 = 666.

It is not a de Polignac number, because 129752073 - 2⁶ = 129752009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129752093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 655215 + ... + 655412.

It is an arithmetic number, because the mean of its divisors is an integer number (17038164).

Almost surely, 2^129752073 is an apocalyptic number.

It is an amenable number.

129752073 is a deficient number, since it is larger than the sum of its proper divisors (74705895).

129752073 is a wasteful number, since it uses less digits than its factorization.

129752073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310644 (or 1310641 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 129752073 is about 11390.8767441317. The cubic root of 129752073 is about 506.2574590579.

The spelling of 129752073 in words is "one hundred twenty-nine million, seven hundred fifty-two thousand, seventy-three".