133505407 has 8 divisors (see below), whose sum is σ = 154059776. Its totient is φ = 113321592.

The previous prime is 133505399. The next prime is 133505431. The reversal of 133505407 is 704505331.

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 133505407 - 2³ = 133505399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133505467) 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, 91863 + ... + 93304.

It is an arithmetic number, because the mean of its divisors is an integer number (19257472).

Almost surely, 2^133505407 is an apocalyptic number.

133505407 is a deficient number, since it is larger than the sum of its proper divisors (20554369).

133505407 is a wasteful number, since it uses less digits than its factorization.

133505407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185277.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 133505407 is about 11554.4539896959. The cubic root of 133505407 is about 511.0926299118.

The spelling of 133505407 in words is "one hundred thirty-three million, five hundred five thousand, four hundred seven".