749743 has 4 divisors (see below), whose sum is σ = 753120. Its totient is φ = 746368.

The previous prime is 749741. The next prime is 749747. The reversal of 749743 is 347947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 347947 = 19 ⋅18313.

It is a cyclic number.

It is not a de Polignac number, because 749743 - 2¹ = 749741 is a prime.

It is a super-2 number, since 2×749743² = 1124229132098, which contains 22 as substring.

It is a Duffinian number.

749743 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 749699 and 749708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749741) 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, 1330 + ... + 1807.

It is an arithmetic number, because the mean of its divisors is an integer number (188280).

2⁷⁴⁹⁷⁴³ is an apocalyptic number.

749743 is a deficient number, since it is larger than the sum of its proper divisors (3377).

749743 is a wasteful number, since it uses less digits than its factorization.

749743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3376.

The product of its digits is 21168, while the sum is 34.

The square root of 749743 is about 865.8770120519. The cubic root of 749743 is about 90.8456506784.

The spelling of 749743 in words is "seven hundred forty-nine thousand, seven hundred forty-three".