129771196 has 12 divisors (see below), whose sum is σ = 227291848. Its totient is φ = 64830672.

The previous prime is 129771181. The next prime is 129771199. The reversal of 129771196 is 691177921.

It is a super-2 number, since 2×129771196² = 33681126622540832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129771199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8166 + ... + 18061.

Almost surely, 2^129771196 is an apocalyptic number.

It is an amenable number.

129771196 is a deficient number, since it is larger than the sum of its proper divisors (97520652).

129771196 is a wasteful number, since it uses less digits than its factorization.

129771196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27468 (or 27466 counting only the distinct ones).

The product of its digits is 47628, while the sum is 43.

The square root of 129771196 is about 11391.7161130358. The cubic root of 129771196 is about 506.2823287590.

The spelling of 129771196 in words is "one hundred twenty-nine million, seven hundred seventy-one thousand, one hundred ninety-six".