133989455 has 4 divisors (see below), whose sum is σ = 160787352. Its totient is φ = 107191560.

The previous prime is 133989439. The next prime is 133989487. The reversal of 133989455 is 554989331.

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

It is not a de Polignac number, because 133989455 - 2⁴ = 133989439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13398941 + ... + 13398950.

It is an arithmetic number, because the mean of its divisors is an integer number (40196838).

Almost surely, 2^133989455 is an apocalyptic number.

133989455 is a deficient number, since it is larger than the sum of its proper divisors (26797897).

133989455 is an equidigital number, since it uses as much as digits as its factorization.

133989455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26797896.

The product of its digits is 583200, while the sum is 47.

The square root of 133989455 is about 11575.3814192017. The cubic root of 133989455 is about 511.7095711575.

The spelling of 133989455 in words is "one hundred thirty-three million, nine hundred eighty-nine thousand, four hundred fifty-five".