129963646 has 8 divisors (see below), whose sum is σ = 195263280. Its totient is φ = 64875888.

The previous prime is 129963577. The next prime is 129963653. The reversal of 129963646 is 646369921.

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

It is a super-2 number, since 2×129963646² = 33781098563226632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129963596 and 129963605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51426 + ... + 53893.

It is an arithmetic number, because the mean of its divisors is an integer number (24407910).

Almost surely, 2^129963646 is an apocalyptic number.

129963646 is a deficient number, since it is larger than the sum of its proper divisors (65299634).

129963646 is a wasteful number, since it uses less digits than its factorization.

129963646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105938.

The product of its digits is 419904, while the sum is 46.

The square root of 129963646 is about 11400.1599111591. The cubic root of 129963646 is about 506.5324764859.

The spelling of 129963646 in words is "one hundred twenty-nine million, nine hundred sixty-three thousand, six hundred forty-six".