749643 has 4 divisors (see below), whose sum is σ = 999528. Its totient is φ = 499760.

The previous prime is 749641. The next prime is 749653. The reversal of 749643 is 346947.

749643 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.

It is a cyclic number.

It is not a de Polignac number, because 749643 - 2¹ = 749641 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 749643.

It is not an unprimeable number, because it can be changed into a prime (749641) 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, 124938 + ... + 124943.

It is an arithmetic number, because the mean of its divisors is an integer number (249882).

2⁷⁴⁹⁶⁴³ is an apocalyptic number.

749643 is a deficient number, since it is larger than the sum of its proper divisors (249885).

749643 is a wasteful number, since it uses less digits than its factorization.

749643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249884.

The product of its digits is 18144, while the sum is 33.

The square root of 749643 is about 865.8192652049. The cubic root of 749643 is about 90.8416115303.

The spelling of 749643 in words is "seven hundred forty-nine thousand, six hundred forty-three".