133773109 has 4 divisors (see below), whose sum is σ = 134282016. Its totient is φ = 133264204.

The previous prime is 133773103. The next prime is 133773121. The reversal of 133773109 is 901377331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 133773109 - 2⁵ = 133773077 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 (133773103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254059 + ... + 254584.

It is an arithmetic number, because the mean of its divisors is an integer number (33570504).

Almost surely, 2^133773109 is an apocalyptic number.

It is an amenable number.

133773109 is a deficient number, since it is larger than the sum of its proper divisors (508907).

133773109 is an equidigital number, since it uses as much as digits as its factorization.

133773109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508906.

The product of its (nonzero) digits is 11907, while the sum is 34.

The square root of 133773109 is about 11566.0325522627. The cubic root of 133773109 is about 511.4340122678.

The spelling of 133773109 in words is "one hundred thirty-three million, seven hundred seventy-three thousand, one hundred nine".