129963649 has 8 divisors (see below), whose sum is σ = 132047552. Its totient is φ = 127895760.

The previous prime is 129963577. The next prime is 129963653. The reversal of 129963649 is 946369921.

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

It is a cyclic number.

It is not a de Polignac number, because 129963649 - 2²⁵ = 96409217 is a prime.

It is a super-2 number, since 2×129963649² = 33781100122790402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129963689) 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, 12919 + ... + 20659.

It is an arithmetic number, because the mean of its divisors is an integer number (16505944).

Almost surely, 2^129963649 is an apocalyptic number.

It is an amenable number.

129963649 is a deficient number, since it is larger than the sum of its proper divisors (2083903).

129963649 is a wasteful number, since it uses less digits than its factorization.

129963649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8007.

The product of its digits is 629856, while the sum is 49.

The square root of 129963649 is about 11400.1600427362. The cubic root of 129963649 is about 506.5324803834.

The spelling of 129963649 in words is "one hundred twenty-nine million, nine hundred sixty-three thousand, six hundred forty-nine".