133029989 has 4 divisors (see below), whose sum is σ = 137617260. Its totient is φ = 128442720.

The previous prime is 133029979. The next prime is 133030019. The reversal of 133029989 is 989920331.

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 93276964 + 39753025 = 9658^2 + 6305^2 .

It is a cyclic number.

It is not a de Polignac number, because 133029989 - 2⁴ = 133029973 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 (133029979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2293592 + ... + 2293649.

It is an arithmetic number, because the mean of its divisors is an integer number (34404315).

Almost surely, 2^133029989 is an apocalyptic number.

It is an amenable number.

133029989 is a deficient number, since it is larger than the sum of its proper divisors (4587271).

133029989 is an equidigital number, since it uses as much as digits as its factorization.

133029989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4587270.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 133029989 is about 11533.8627094309. The cubic root of 133029989 is about 510.4852347086.

The spelling of 133029989 in words is "one hundred thirty-three million, twenty-nine thousand, nine hundred eighty-nine".