129919012 has 6 divisors (see below), whose sum is σ = 227358278. Its totient is φ = 64959504.

The previous prime is 129919007. The next prime is 129919067. The reversal of 129919012 is 210919921.

It can be written as a sum of positive squares in only one way, i.e., 94206436 + 35712576 = 9706^2 + 5976^2 .

It is a super-2 number, since 2×129919012² = 33757899358112288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16239873 + ... + 16239880.

Almost surely, 2^129919012 is an apocalyptic number.

It is an amenable number.

129919012 is a deficient number, since it is larger than the sum of its proper divisors (97439266).

129919012 is a wasteful number, since it uses less digits than its factorization.

129919012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32479757 (or 32479755 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 129919012 is about 11398.2021389340. The cubic root of 129919012 is about 506.4744829369.

The spelling of 129919012 in words is "one hundred twenty-nine million, nine hundred nineteen thousand, twelve".