749083721 has 16 divisors (see below), whose sum is σ = 827328000. Its totient is φ = 675475200.

The previous prime is 749083681. The next prime is 749083723. The reversal of 749083721 is 127380947.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-749083721 is a prime.

It is a super-3 number, since 3×749083721³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (749083723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25505 + ... + 46353.

It is an arithmetic number, because the mean of its divisors is an integer number (51708000).

Almost surely, 2^749083721 is an apocalyptic number.

It is an amenable number.

749083721 is a deficient number, since it is larger than the sum of its proper divisors (78244279).

749083721 is a wasteful number, since it uses less digits than its factorization.

749083721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20960.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 749083721 is about 27369.3938734492. The cubic root of 749083721 is about 908.1901479844.

The spelling of 749083721 in words is "seven hundred forty-nine million, eighty-three thousand, seven hundred twenty-one".