129953381 has 8 divisors (see below), whose sum is σ = 135718080. Its totient is φ = 124198272.

The previous prime is 129953377. The next prime is 129953399. The reversal of 129953381 is 183359921.

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 129953381 - 2² = 129953377 is a prime.

It is a super-2 number, since 2×129953381² = 33775762466662322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129953311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48821 + ... + 51413.

It is an arithmetic number, because the mean of its divisors is an integer number (16964760).

Almost surely, 2^129953381 is an apocalyptic number.

It is an amenable number.

129953381 is a deficient number, since it is larger than the sum of its proper divisors (5764699).

129953381 is a wasteful number, since it uses less digits than its factorization.

129953381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4795.

The product of its digits is 58320, while the sum is 41.

The square root of 129953381 is about 11399.7096892860. The cubic root of 129953381 is about 506.5191402109.

The spelling of 129953381 in words is "one hundred twenty-nine million, nine hundred fifty-three thousand, three hundred eighty-one".