129669953 has 8 divisors (see below), whose sum is σ = 148670208. Its totient is φ = 110788704.

The previous prime is 129669937. The next prime is 129669971. The reversal of 129669953 is 359966921.

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 129669953 - 2⁴ = 129669937 is a prime.

It is a super-2 number, since 2×129669953² = 33628593422044418, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129668953) 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, 27401 + ... + 31782.

It is an arithmetic number, because the mean of its divisors is an integer number (18583776).

Almost surely, 2^129669953 is an apocalyptic number.

It is an amenable number.

129669953 is a deficient number, since it is larger than the sum of its proper divisors (19000255).

129669953 is an equidigital number, since it uses as much as digits as its factorization.

129669953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59503.

The product of its digits is 787320, while the sum is 50.

The square root of 129669953 is about 11387.2715344809. The cubic root of 129669953 is about 506.1506331826.

The spelling of 129669953 in words is "one hundred twenty-nine million, six hundred sixty-nine thousand, nine hundred fifty-three".