723666073 has 4 divisors (see below), whose sum is σ = 779332708. Its totient is φ = 667999440.

The previous prime is 723666059. The next prime is 723666103. The reversal of 723666073 is 370666327.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 500103769 + 223562304 = 22363^2 + 14952^2 .

It is a cyclic number.

It is not a de Polignac number, because 723666073 - 2⁹ = 723665561 is a prime.

It is a super-2 number, since 2×723666073² = 1047385170422482658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (723666173) 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, 27833298 + ... + 27833323.

It is an arithmetic number, because the mean of its divisors is an integer number (194833177).

Almost surely, 2^723666073 is an apocalyptic number.

It is an amenable number.

723666073 is a deficient number, since it is larger than the sum of its proper divisors (55666635).

723666073 is a wasteful number, since it uses less digits than its factorization.

723666073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55666634.

The product of its (nonzero) digits is 190512, while the sum is 40.

The square root of 723666073 is about 26901.0422288803. The cubic root of 723666073 is about 897.7995929290.

The spelling of 723666073 in words is "seven hundred twenty-three million, six hundred sixty-six thousand, seventy-three".