133748709 has 4 divisors (see below), whose sum is σ = 178331616. Its totient is φ = 89165804.

The previous prime is 133748701. The next prime is 133748729. The reversal of 133748709 is 907847331.

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 a cyclic number.

It is not a de Polignac number, because 133748709 - 2³ = 133748701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133748701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22291449 + ... + 22291454.

It is an arithmetic number, because the mean of its divisors is an integer number (44582904).

Almost surely, 2^133748709 is an apocalyptic number.

It is an amenable number.

133748709 is a deficient number, since it is larger than the sum of its proper divisors (44582907).

133748709 is an equidigital number, since it uses as much as digits as its factorization.

133748709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44582906.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 133748709 is about 11564.9776912885. The cubic root of 133748709 is about 511.4029154632.

The spelling of 133748709 in words is "one hundred thirty-three million, seven hundred forty-eight thousand, seven hundred nine".