749857133 has 4 divisors (see below), whose sum is σ = 770123580. Its totient is φ = 729590688.

The previous prime is 749857111. The next prime is 749857139. The reversal of 749857133 is 331758947.

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 392911684 + 356945449 = 19822^2 + 18893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-749857133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749857139) 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 3 ways as a sum of consecutive naturals, for example, 10133168 + ... + 10133241.

It is an arithmetic number, because the mean of its divisors is an integer number (192530895).

Almost surely, 2^749857133 is an apocalyptic number.

It is an amenable number.

749857133 is a deficient number, since it is larger than the sum of its proper divisors (20266447).

749857133 is a wasteful number, since it uses less digits than its factorization.

749857133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20266446.

The product of its digits is 635040, while the sum is 47.

The square root of 749857133 is about 27383.5193684084. The cubic root of 749857133 is about 908.5026024042.

The spelling of 749857133 in words is "seven hundred forty-nine million, eight hundred fifty-seven thousand, one hundred thirty-three".