129496665 has 8 divisors (see below), whose sum is σ = 207194688. Its totient is φ = 69064880.

The previous prime is 129496651. The next prime is 129496699. The reversal of 129496665 is 566694921.

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

It is not a de Polignac number, because 129496665 - 2²⁵ = 95942233 is a prime.

It is a super-2 number, since 2×129496665² = 33538772492244450, which contains 22 as substring.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 4316541 + ... + 4316570.

It is an arithmetic number, because the mean of its divisors is an integer number (25899336).

Almost surely, 2^129496665 is an apocalyptic number.

129496665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129496665 is a deficient number, since it is larger than the sum of its proper divisors (77698023).

129496665 is an equidigital number, since it uses as much as digits as its factorization.

129496665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8633119.

The product of its digits is 699840, while the sum is 48.

The square root of 129496665 is about 11379.6601443101. The cubic root of 129496665 is about 505.9250632412.

The spelling of 129496665 in words is "one hundred twenty-nine million, four hundred ninety-six thousand, six hundred sixty-five".