129691001 has 8 divisors (see below), whose sum is σ = 144491904. Its totient is φ = 115391920.

The previous prime is 129690983. The next prime is 129691021. The reversal of 129691001 is 100196921.

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 129691001 - 2¹⁴ = 129674617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129691021) by changing a digit.

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, 124910 + ... + 125943.

It is an arithmetic number, because the mean of its divisors is an integer number (18061488).

Almost surely, 2^129691001 is an apocalyptic number.

129691001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

129691001 is a deficient number, since it is larger than the sum of its proper divisors (14800903).

129691001 is a wasteful number, since it uses less digits than its factorization.

129691001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250911.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 129691001 is about 11388.1956867627. The cubic root of 129691001 is about 506.1780177897.

The spelling of 129691001 in words is "one hundred twenty-nine million, six hundred ninety-one thousand, one".