129707833 has 8 divisors (see below), whose sum is σ = 135508608. Its totient is φ = 123920544.

The previous prime is 129707821. The next prime is 129707839. The reversal of 129707833 is 338707921.

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 129707833 - 2⁹ = 129707321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129707839) 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, 19741 + ... + 25477.

It is an arithmetic number, because the mean of its divisors is an integer number (16938576).

Almost surely, 2^129707833 is an apocalyptic number.

It is an amenable number.

129707833 is a deficient number, since it is larger than the sum of its proper divisors (5800775).

129707833 is an equidigital number, since it uses as much as digits as its factorization.

129707833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6743.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 129707833 is about 11388.9346736207. The cubic root of 129707833 is about 506.1999150166.

The spelling of 129707833 in words is "one hundred twenty-nine million, seven hundred seven thousand, eight hundred thirty-three".