723671 has 4 divisors (see below), whose sum is σ = 779352. Its totient is φ = 667992.

The previous prime is 723661. The next prime is 723721. The reversal of 723671 is 176327.

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

It is not a de Polignac number, because 723671 - 2⁶ = 723607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 723671.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 723671.

It is not an unprimeable number, because it can be changed into a prime (723601) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 27821 + ... + 27846.

It is an arithmetic number, because the mean of its divisors is an integer number (194838).

2⁷²³⁶⁷¹ is an apocalyptic number.

723671 is a deficient number, since it is larger than the sum of its proper divisors (55681).

723671 is a wasteful number, since it uses less digits than its factorization.

723671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55680.

The product of its digits is 1764, while the sum is 26.

The square root of 723671 is about 850.6885446507. The cubic root of 723671 is about 89.7801630447.

Adding to 723671 its reverse (176327), we get a palindrome (899998).

The spelling of 723671 in words is "seven hundred twenty-three thousand, six hundred seventy-one".