723861 has 6 divisors (see below), whose sum is σ = 1045590. Its totient is φ = 482568.

The previous prime is 723859. The next prime is 723893. The reversal of 723861 is 168327.

723861 is digitally balanced in base 2 and base 7, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 463761 + 260100 = 681^2 + 510^2 .

It is not a de Polignac number, because 723861 - 2¹ = 723859 is a prime.

723861 is strictly pandigital in base 7.

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 723861.

It is not an unprimeable number, because it can be changed into a prime (723851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40206 + ... + 40223.

It is an arithmetic number, because the mean of its divisors is an integer number (174265).

2⁷²³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

723861 is a deficient number, since it is larger than the sum of its proper divisors (321729).

723861 is a wasteful number, since it uses less digits than its factorization.

723861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80435 (or 80432 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 723861 is about 850.8002115656. The cubic root of 723861 is about 89.7880196252.

The spelling of 723861 in words is "seven hundred twenty-three thousand, eight hundred sixty-one".