129789524 has 6 divisors (see below), whose sum is σ = 227131674. Its totient is φ = 64894760.

The previous prime is 129789511. The next prime is 129789533. The reversal of 129789524 is 425987921.

It can be written as a sum of positive squares in only one way, i.e., 125037124 + 4752400 = 11182^2 + 2180^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16223687 + ... + 16223694.

It is an arithmetic number, because the mean of its divisors is an integer number (37855279).

Almost surely, 2^129789524 is an apocalyptic number.

It is an amenable number.

129789524 is a deficient number, since it is larger than the sum of its proper divisors (97342150).

129789524 is a wasteful number, since it uses less digits than its factorization.

129789524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32447385 (or 32447383 counting only the distinct ones).

The product of its digits is 362880, while the sum is 47.

The square root of 129789524 is about 11392.5205288382. The cubic root of 129789524 is about 506.3061622598.

The spelling of 129789524 in words is "one hundred twenty-nine million, seven hundred eighty-nine thousand, five hundred twenty-four".