129549436 has 6 divisors (see below), whose sum is σ = 226711520. Its totient is φ = 64774716.

The previous prime is 129549359. The next prime is 129549439. The reversal of 129549436 is 634945921.

It is a junction number, because it is equal to n+sod(n) for n = 129549392 and 129549401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129549439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16193676 + ... + 16193683.

Almost surely, 2^129549436 is an apocalyptic number.

It is an amenable number.

129549436 is a deficient number, since it is larger than the sum of its proper divisors (97162084).

129549436 is a wasteful number, since it uses less digits than its factorization.

129549436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32387363 (or 32387361 counting only the distinct ones).

The product of its digits is 233280, while the sum is 43.

The square root of 129549436 is about 11381.9785626226. The cubic root of 129549436 is about 505.9937768403.

The spelling of 129549436 in words is "one hundred twenty-nine million, five hundred forty-nine thousand, four hundred thirty-six".