133478889 has 8 divisors (see below), whose sum is σ = 178483200. Its totient is φ = 88730256.

The previous prime is 133478881. The next prime is 133478897. The reversal of 133478889 is 988874331.

It is an interprime number because it is at equal distance from previous prime (133478881) and next prime (133478897).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133478889 - 2³ = 133478881 is a prime.

It is a super-2 number, since 2×133478889² = 35633227617348642, which contains 22 as substring.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (133478881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62697 + ... + 64790.

It is an arithmetic number, because the mean of its divisors is an integer number (22310400).

Almost surely, 2^133478889 is an apocalyptic number.

It is an amenable number.

133478889 is a deficient number, since it is larger than the sum of its proper divisors (45004311).

133478889 is a wasteful number, since it uses less digits than its factorization.

133478889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127839.

The product of its digits is 1161216, while the sum is 51.

The square root of 133478889 is about 11553.3064098551. The cubic root of 133478889 is about 511.0587884565.

The spelling of 133478889 in words is "one hundred thirty-three million, four hundred seventy-eight thousand, eight hundred eighty-nine".