133691325 has 12 divisors (see below), whose sum is σ = 221036448. Its totient is φ = 71302000.

The previous prime is 133691303. The next prime is 133691339. The reversal of 133691325 is 523196331.

It is not a de Polignac number, because 133691325 - 2¹⁰ = 133690301 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 891201 + ... + 891350.

It is an arithmetic number, because the mean of its divisors is an integer number (18419704).

Almost surely, 2^133691325 is an apocalyptic number.

133691325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133691325 is a deficient number, since it is larger than the sum of its proper divisors (87345123).

133691325 is a wasteful number, since it uses less digits than its factorization.

133691325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782564 (or 1782559 counting only the distinct ones).

The product of its digits is 14580, while the sum is 33.

The square root of 133691325 is about 11562.4964864860. The cubic root of 133691325 is about 511.3297669868.

The spelling of 133691325 in words is "one hundred thirty-three million, six hundred ninety-one thousand, three hundred twenty-five".