133770918 has 16 divisors (see below), whose sum is σ = 268061616. Its totient is φ = 44503680.

The previous prime is 133770911. The next prime is 133770919. The reversal of 133770918 is 819077331.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133770911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18271 + ... + 24522.

It is an arithmetic number, because the mean of its divisors is an integer number (16753851).

Almost surely, 2^133770918 is an apocalyptic number.

133770918 is an abundant number, since it is smaller than the sum of its proper divisors (134290698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133770918 is a wasteful number, since it uses less digits than its factorization.

133770918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43319.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 133770918 is about 11565.9378348667. The cubic root of 133770918 is about 511.4312200823.

The spelling of 133770918 in words is "one hundred thirty-three million, seven hundred seventy thousand, nine hundred eighteen".