133829989 has 2 divisors, whose sum is σ = 133829990. Its totient is φ = 133829988.

The previous prime is 133829987. The next prime is 133830023. The reversal of 133829989 is 989928331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125821089 + 8008900 = 11217^2 + 2830^2 .

It is a cyclic number.

It is not a de Polignac number, because 133829989 - 2¹ = 133829987 is a prime.

Together with 133829987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133829987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66914994 + 66914995.

It is an arithmetic number, because the mean of its divisors is an integer number (66914995).

Almost surely, 2^133829989 is an apocalyptic number.

It is an amenable number.

133829989 is a deficient number, since it is larger than the sum of its proper divisors (1).

133829989 is an equidigital number, since it uses as much as digits as its factorization.

133829989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 52.

The square root of 133829989 is about 11568.4912153660. The cubic root of 133829989 is about 511.5064888285.

The spelling of 133829989 in words is "one hundred thirty-three million, eight hundred twenty-nine thousand, nine hundred eighty-nine".