133767749 has 8 divisors (see below), whose sum is σ = 138831960. Its totient is φ = 128733696.

The previous prime is 133767727. The next prime is 133767779. The reversal of 133767749 is 947767331.

It can be written as a sum of positive squares in 4 ways, for example, as 7924225 + 125843524 = 2815^2 + 11218^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133767749 - 2⁸ = 133767493 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 (133767719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1709 + ... + 16445.

It is an arithmetic number, because the mean of its divisors is an integer number (17353995).

Almost surely, 2^133767749 is an apocalyptic number.

It is an amenable number.

133767749 is a deficient number, since it is larger than the sum of its proper divisors (5064211).

133767749 is a wasteful number, since it uses less digits than its factorization.

133767749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15079.

The product of its digits is 666792, while the sum is 47.

The square root of 133767749 is about 11565.8008369503. The cubic root of 133767749 is about 511.4271814906.

The spelling of 133767749 in words is "one hundred thirty-three million, seven hundred sixty-seven thousand, seven hundred forty-nine".