129907381 has 8 divisors (see below), whose sum is σ = 135941760. Its totient is φ = 123905232.

The previous prime is 129907339. The next prime is 129907403. The reversal of 129907381 is 183709921.

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

It is not a de Polignac number, because 129907381 - 2¹¹ = 129905333 is a prime.

It is a super-2 number, since 2×129907381² = 33751855276558322, 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 (129907301) 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, 391 + ... + 16123.

It is an arithmetic number, because the mean of its divisors is an integer number (16992720).

Almost surely, 2^129907381 is an apocalyptic number.

It is an amenable number.

129907381 is a deficient number, since it is larger than the sum of its proper divisors (6034379).

129907381 is a wasteful number, since it uses less digits than its factorization.

129907381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16115.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 129907381 is about 11397.6919154713. The cubic root of 129907381 is about 506.4593684425.

The spelling of 129907381 in words is "one hundred twenty-nine million, nine hundred seven thousand, three hundred eighty-one".