129828952381 has 4 divisors (see below), whose sum is σ = 129835115200. Its totient is φ = 129822789564.

The previous prime is 129828952373. The next prime is 129828952411. The reversal of 129828952381 is 183259828921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129828952381 - 2³ = 129828952373 is a prime.

It is a super-2 number, since 2×129828952381² (a number of 23 digits) 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 (129828952321) 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, 3049701 + ... + 3091978.

It is an arithmetic number, because the mean of its divisors is an integer number (32458778800).

Almost surely, 2^129828952381 is an apocalyptic number.

It is an amenable number.

129828952381 is a deficient number, since it is larger than the sum of its proper divisors (6162819).

129828952381 is an equidigital number, since it uses as much as digits as its factorization.

129828952381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6162818.

The product of its digits is 4976640, while the sum is 58.

The spelling of 129828952381 in words is "one hundred twenty-nine billion, eight hundred twenty-eight million, nine hundred fifty-two thousand, three hundred eighty-one".