133407729 has 56 divisors (see below), whose sum is σ = 246300992. Its totient is φ = 70333920.

The previous prime is 133407713. The next prime is 133407737. The reversal of 133407729 is 927704331.

It is not a de Polignac number, because 133407729 - 2⁴ = 133407713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133407693 and 133407702.

It is not an unprimeable number, because it can be changed into a prime (133407779) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 65334 + ... + 67344.

It is an arithmetic number, because the mean of its divisors is an integer number (4398232).

Almost surely, 2^133407729 is an apocalyptic number.

It is an amenable number.

133407729 is a deficient number, since it is larger than the sum of its proper divisors (112893263).

133407729 is an equidigital number, since it uses as much as digits as its factorization.

133407729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049 (or 2034 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 133407729 is about 11550.2263614182. The cubic root of 133407729 is about 510.9679540976.

The spelling of 133407729 in words is "one hundred thirty-three million, four hundred seven thousand, seven hundred twenty-nine".