743323661 has 4 divisors (see below), whose sum is σ = 754418112. Its totient is φ = 732229212.

The previous prime is 743323649. The next prime is 743323667. The reversal of 743323661 is 166323347.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 743323661 - 2⁶ = 743323597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (743323667) 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 3 ways as a sum of consecutive naturals, for example, 5547125 + ... + 5547258.

It is an arithmetic number, because the mean of its divisors is an integer number (188604528).

Almost surely, 2^743323661 is an apocalyptic number.

It is an amenable number.

743323661 is a deficient number, since it is larger than the sum of its proper divisors (11094451).

743323661 is a wasteful number, since it uses less digits than its factorization.

743323661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11094450.

The product of its digits is 54432, while the sum is 35.

The square root of 743323661 is about 27263.9626796986. The cubic root of 743323661 is about 905.8563208296.

The spelling of 743323661 in words is "seven hundred forty-three million, three hundred twenty-three thousand, six hundred sixty-one".