129196381 has 8 divisors (see below), whose sum is σ = 132413600. Its totient is φ = 125988912.

The previous prime is 129196367. The next prime is 129196387. The reversal of 129196381 is 183691921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129196381 - 2¹⁵ = 129163613 is a prime.

It is a super-2 number, since 2×129196381² = 33383409726994322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129196387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29470 + ... + 33568.

It is an arithmetic number, because the mean of its divisors is an integer number (16551700).

Almost surely, 2^129196381 is an apocalyptic number.

It is an amenable number.

129196381 is a deficient number, since it is larger than the sum of its proper divisors (3217219).

129196381 is an equidigital number, since it uses as much as digits as its factorization.

129196381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4875.

The product of its digits is 23328, while the sum is 40.

The square root of 129196381 is about 11366.4585953585. The cubic root of 129196381 is about 505.5337049491.

The spelling of 129196381 in words is "one hundred twenty-nine million, one hundred ninety-six thousand, three hundred eighty-one".