133109749 has 4 divisors (see below), whose sum is σ = 133164364. Its totient is φ = 133055136.

The previous prime is 133109741. The next prime is 133109759. The reversal of 133109749 is 947901331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 76212900 + 56896849 = 8730^2 + 7543^2 .

It is a cyclic number.

It is not a de Polignac number, because 133109749 - 2³ = 133109741 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 (133109741) 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, 23472 + ... + 28585.

It is an arithmetic number, because the mean of its divisors is an integer number (33291091).

Almost surely, 2^133109749 is an apocalyptic number.

It is an amenable number.

133109749 is a deficient number, since it is larger than the sum of its proper divisors (54615).

133109749 is an equidigital number, since it uses as much as digits as its factorization.

133109749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54614.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 133109749 is about 11537.3198360798. The cubic root of 133109749 is about 510.5872371918.

The spelling of 133109749 in words is "one hundred thirty-three million, one hundred nine thousand, seven hundred forty-nine".