133775837 has 6 divisors (see below), whose sum is σ = 144858042. Its totient is φ = 123485232.

The previous prime is 133775821. The next prime is 133775849. The reversal of 133775837 is 738577331.

It can be written as a sum of positive squares in 3 ways, for example, as 3481 + 133772356 = 59^2 + 11566^2 .

It is not a de Polignac number, because 133775837 - 2⁴ = 133775821 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 (133775897) 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 5 ways as a sum of consecutive naturals, for example, 395618 + ... + 395955.

It is an arithmetic number, because the mean of its divisors is an integer number (24143007).

Almost surely, 2^133775837 is an apocalyptic number.

It is an amenable number.

133775837 is a deficient number, since it is larger than the sum of its proper divisors (11082205).

133775837 is an equidigital number, since it uses as much as digits as its factorization.

133775837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791599 (or 791586 counting only the distinct ones).

The product of its digits is 370440, while the sum is 44.

The square root of 133775837 is about 11566.1504831988. The cubic root of 133775837 is about 511.4374887575.

The spelling of 133775837 in words is "one hundred thirty-three million, seven hundred seventy-five thousand, eight hundred thirty-seven".