129733807 has 4 divisors (see below), whose sum is σ = 148267216. Its totient is φ = 111200400.

The previous prime is 129733711. The next prime is 129733829. The reversal of 129733807 is 708337921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129733807 - 2¹¹ = 129731759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129733807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129733837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9266694 + ... + 9266707.

It is an arithmetic number, because the mean of its divisors is an integer number (37066804).

Almost surely, 2^129733807 is an apocalyptic number.

129733807 is a deficient number, since it is larger than the sum of its proper divisors (18533409).

129733807 is an equidigital number, since it uses as much as digits as its factorization.

129733807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18533408.

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

The square root of 129733807 is about 11390.0749339063. The cubic root of 129733807 is about 506.2337016142.

The spelling of 129733807 in words is "one hundred twenty-nine million, seven hundred thirty-three thousand, eight hundred seven".