129986229 has 8 divisors (see below), whose sum is σ = 173391040. Its totient is φ = 86619456.

The previous prime is 129986221. The next prime is 129986237. The reversal of 129986229 is 922689921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (129986221) and next prime (129986237).

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

It is not a de Polignac number, because 129986229 - 2³ = 129986221 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 (129986221) 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, 244 + ... + 16125.

It is an arithmetic number, because the mean of its divisors is an integer number (21673880).

Almost surely, 2^129986229 is an apocalyptic number.

It is an amenable number.

129986229 is a deficient number, since it is larger than the sum of its proper divisors (43404811).

129986229 is a wasteful number, since it uses less digits than its factorization.

129986229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19019.

The product of its digits is 279936, while the sum is 48.

The square root of 129986229 is about 11401.1503366985. The cubic root of 129986229 is about 506.5618138193.

The spelling of 129986229 in words is "one hundred twenty-nine million, nine hundred eighty-six thousand, two hundred twenty-nine".