133810829 has 4 divisors (see below), whose sum is σ = 134584476. Its totient is φ = 133037184.

The previous prime is 133810823. The next prime is 133810841. The reversal of 133810829 is 928018331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86062729 + 47748100 = 9277^2 + 6910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133810829 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 (133810823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386564 + ... + 386909.

It is an arithmetic number, because the mean of its divisors is an integer number (33646119).

Almost surely, 2^133810829 is an apocalyptic number.

It is an amenable number.

133810829 is a deficient number, since it is larger than the sum of its proper divisors (773647).

133810829 is an equidigital number, since it uses as much as digits as its factorization.

133810829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773646.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 133810829 is about 11567.6630742774. The cubic root of 133810829 is about 511.4820774288.

It can be divided in two parts, 1338 and 10829, that added together give a cube (12167 = 23³).

The spelling of 133810829 in words is "one hundred thirty-three million, eight hundred ten thousand, eight hundred twenty-nine".