749657 has 4 divisors (see below), whose sum is σ = 769956. Its totient is φ = 729360.

The previous prime is 749653. The next prime is 749659. The reversal of 749657 is 756947.

749657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 756947 = 103 ⋅7349.

It can be written as a sum of positive squares in 2 ways, for example, as 292681 + 456976 = 541^2 + 676^2 .

It is a cyclic number.

It is not a de Polignac number, because 749657 - 2² = 749653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 749657.

It is not an unprimeable number, because it can be changed into a prime (749653) 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, 10094 + ... + 10167.

It is an arithmetic number, because the mean of its divisors is an integer number (192489).

2⁷⁴⁹⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

749657 is a deficient number, since it is larger than the sum of its proper divisors (20299).

749657 is a wasteful number, since it uses less digits than its factorization.

749657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20298.

The product of its digits is 52920, while the sum is 38.

The square root of 749657 is about 865.8273499954. The cubic root of 749657 is about 90.8421770327.

The spelling of 749657 in words is "seven hundred forty-nine thousand, six hundred fifty-seven".