129789626 has 8 divisors (see below), whose sum is σ = 195442740. Its totient is φ = 64642048.

The previous prime is 129789619. The next prime is 129789659. The reversal of 129789626 is 626987921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 109223401 + 20566225 = 10451^2 + 4535^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125741 + ... + 126768.

Almost surely, 2^129789626 is an apocalyptic number.

129789626 is a deficient number, since it is larger than the sum of its proper divisors (65653114).

129789626 is a wasteful number, since it uses less digits than its factorization.

129789626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252768.

The product of its digits is 653184, while the sum is 50.

The square root of 129789626 is about 11392.5250054586. The cubic root of 129789626 is about 506.3062948931.

The spelling of 129789626 in words is "one hundred twenty-nine million, seven hundred eighty-nine thousand, six hundred twenty-six".