133490889 has 16 divisors (see below), whose sum is σ = 226016640. Its totient is φ = 76280400.

The previous prime is 133490887. The next prime is 133490891. The reversal of 133490889 is 988094331.

It is an interprime number because it is at equal distance from previous prime (133490887) and next prime (133490891).

It is not a de Polignac number, because 133490889 - 2¹ = 133490887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133490887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352962 + ... + 353339.

It is an arithmetic number, because the mean of its divisors is an integer number (14126040).

Almost surely, 2^133490889 is an apocalyptic number.

It is an amenable number.

133490889 is a deficient number, since it is larger than the sum of its proper divisors (92525751).

133490889 is an equidigital number, since it uses as much as digits as its factorization.

133490889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706317 (or 706311 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 133490889 is about 11553.8257300342. The cubic root of 133490889 is about 511.0741030423.

The spelling of 133490889 in words is "one hundred thirty-three million, four hundred ninety thousand, eight hundred eighty-nine".