133487407 has 4 divisors (see below), whose sum is σ = 140513080. Its totient is φ = 126461736.

The previous prime is 133487401. The next prime is 133487411. The reversal of 133487407 is 704784331.

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 133487407 - 2¹⁵ = 133454639 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 (133487401) 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 3 ways as a sum of consecutive naturals, for example, 3512808 + ... + 3512845.

It is an arithmetic number, because the mean of its divisors is an integer number (35128270).

Almost surely, 2^133487407 is an apocalyptic number.

133487407 is a deficient number, since it is larger than the sum of its proper divisors (7025673).

133487407 is an equidigital number, since it uses as much as digits as its factorization.

133487407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025672.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 133487407 is about 11553.6750430328. The cubic root of 133487407 is about 511.0696593545.

The spelling of 133487407 in words is "one hundred thirty-three million, four hundred eighty-seven thousand, four hundred seven".