129884357 has 4 divisors (see below), whose sum is σ = 130832556. Its totient is φ = 128936160.

The previous prime is 129884353. The next prime is 129884371. The reversal of 129884357 is 753488921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65788321 + 64096036 = 8111^2 + 8006^2 .

It is a cyclic number.

It is not a de Polignac number, because 129884357 - 2² = 129884353 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129884353) 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, 473894 + ... + 474167.

It is an arithmetic number, because the mean of its divisors is an integer number (32708139).

Almost surely, 2^129884357 is an apocalyptic number.

It is an amenable number.

129884357 is a deficient number, since it is larger than the sum of its proper divisors (948199).

129884357 is an equidigital number, since it uses as much as digits as its factorization.

129884357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948198.

The product of its digits is 483840, while the sum is 47.

The square root of 129884357 is about 11396.6818416590. The cubic root of 129884357 is about 506.4294460743.

The spelling of 129884357 in words is "one hundred twenty-nine million, eight hundred eighty-four thousand, three hundred fifty-seven".