723381 has 4 divisors (see below), whose sum is σ = 964512. Its totient is φ = 482252.

The previous prime is 723379. The next prime is 723391. The reversal of 723381 is 183327.

723381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 723381 - 2¹ = 723379 is a prime.

It is a super-2 number, since 2×723381² = 1046560142322, which contains 22 as substring.

It is a D-number.

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 723381.

It is not an unprimeable number, because it can be changed into a prime (723361) 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, 120561 + ... + 120566.

It is an arithmetic number, because the mean of its divisors is an integer number (241128).

2⁷²³³⁸¹ is an apocalyptic number.

It is an amenable number.

723381 is a deficient number, since it is larger than the sum of its proper divisors (241131).

723381 is a wasteful number, since it uses less digits than its factorization.

723381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241130.

The product of its digits is 1008, while the sum is 24.

The square root of 723381 is about 850.5180774093. The cubic root of 723381 is about 89.7681687702.

The spelling of 723381 in words is "seven hundred twenty-three thousand, three hundred eighty-one".