133191729 has 32 divisors (see below), whose sum is σ = 226598400. Its totient is φ = 76470480.

The previous prime is 133191727. The next prime is 133191743. The reversal of 133191729 is 927191331.

It is a happy number.

It is not a de Polignac number, because 133191729 - 2¹ = 133191727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133191693 and 133191702.

It is not an unprimeable number, because it can be changed into a prime (133191727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6159 + ... + 17444.

It is an arithmetic number, because the mean of its divisors is an integer number (7081200).

Almost surely, 2^133191729 is an apocalyptic number.

133191729 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

133191729 is a deficient number, since it is larger than the sum of its proper divisors (93406671).

133191729 is a wasteful number, since it uses less digits than its factorization.

133191729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23642 (or 23636 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 133191729 is about 11540.8721074276. The cubic root of 133191729 is about 510.6920363063.

The spelling of 133191729 in words is "one hundred thirty-three million, one hundred ninety-one thousand, seven hundred twenty-nine".