129153986 has 8 divisors (see below), whose sum is σ = 208633404. Its totient is φ = 59609520.

The previous prime is 129153971. The next prime is 129153989. The reversal of 129153986 is 689351921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 116229961 + 12924025 = 10781^2 + 3595^2 .

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

It is not an unprimeable number, because it can be changed into a prime (129153989) 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, 2483705 + ... + 2483756.

Almost surely, 2^129153986 is an apocalyptic number.

129153986 is a deficient number, since it is larger than the sum of its proper divisors (79479418).

129153986 is a wasteful number, since it uses less digits than its factorization.

129153986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4967476.

The product of its digits is 116640, while the sum is 44.

The square root of 129153986 is about 11364.5935255072. The cubic root of 129153986 is about 505.4784029714.

The spelling of 129153986 in words is "one hundred twenty-nine million, one hundred fifty-three thousand, nine hundred eighty-six".