743668 has 6 divisors (see below), whose sum is σ = 1301426. Its totient is φ = 371832.

The previous prime is 743657. The next prime is 743669. The reversal of 743668 is 866347.

It can be written as a sum of positive squares in only one way, i.e., 605284 + 138384 = 778^2 + 372^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (743669) by changing a digit.

743668 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92955 + ... + 92962.

2⁷⁴³⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

743668 is a deficient number, since it is larger than the sum of its proper divisors (557758).

743668 is a wasteful number, since it uses less digits than its factorization.

743668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185921 (or 185919 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 743668 is about 862.3618729976. The cubic root of 743668 is about 90.5996176240.

The spelling of 743668 in words is "seven hundred forty-three thousand, six hundred sixty-eight".