133691358 has 16 divisors (see below), whose sum is σ = 267497856. Its totient is φ = 44544600.

The previous prime is 133691339. The next prime is 133691381. The reversal of 133691358 is 853196331.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20833 + ... + 26483.

It is an arithmetic number, because the mean of its divisors is an integer number (16718616).

Almost surely, 2^133691358 is an apocalyptic number.

133691358 is an abundant number, since it is smaller than the sum of its proper divisors (133806498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133691358 is a wasteful number, since it uses less digits than its factorization.

133691358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9599.

The product of its digits is 58320, while the sum is 39.

The square root of 133691358 is about 11562.4979135133. The cubic root of 133691358 is about 511.3298090586.

The spelling of 133691358 in words is "one hundred thirty-three million, six hundred ninety-one thousand, three hundred fifty-eight".