129813626 has 8 divisors (see below), whose sum is σ = 199469844. Its totient is φ = 63323680.

The previous prime is 129813623. The next prime is 129813641. The reversal of 129813626 is 626318921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 128709025 + 1104601 = 11345^2 + 1051^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 129813626.

It is not an unprimeable number, because it can be changed into a prime (129813623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 791465 + ... + 791628.

Almost surely, 2^129813626 is an apocalyptic number.

129813626 is a deficient number, since it is larger than the sum of its proper divisors (69656218).

129813626 is a wasteful number, since it uses less digits than its factorization.

129813626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583136.

The product of its digits is 31104, while the sum is 38.

The square root of 129813626 is about 11393.5782790131. The cubic root of 129813626 is about 506.3375007825.

The spelling of 129813626 in words is "one hundred twenty-nine million, eight hundred thirteen thousand, six hundred twenty-six".