129189356 has 12 divisors (see below), whose sum is σ = 227732568. Its totient is φ = 64122912.

The previous prime is 129189349. The next prime is 129189371. The reversal of 129189356 is 653981921.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117326 + ... + 118421.

It is an arithmetic number, because the mean of its divisors is an integer number (18977714).

Almost surely, 2^129189356 is an apocalyptic number.

It is an amenable number.

129189356 is a deficient number, since it is larger than the sum of its proper divisors (98543212).

129189356 is a wasteful number, since it uses less digits than its factorization.

129189356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235888 (or 235886 counting only the distinct ones).

The product of its digits is 116640, while the sum is 44.

The square root of 129189356 is about 11366.1495679056. The cubic root of 129189356 is about 505.5245420540.

The spelling of 129189356 in words is "one hundred twenty-nine million, one hundred eighty-nine thousand, three hundred fifty-six".