723361 has 2 divisors, whose sum is σ = 723362. Its totient is φ = 723360.

The previous prime is 723353. The next prime is 723379. The reversal of 723361 is 163327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 712336 + 11025 = 844^2 + 105^2 .

It is an emirp because it is prime and its reverse (163327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 723361 - 2³ = 723353 is a prime.

It is a super-2 number, since 2×723361² = 1046502272642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (723391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361680 + 361681.

It is an arithmetic number, because the mean of its divisors is an integer number (361681).

2⁷²³³⁶¹ is an apocalyptic number.

It is an amenable number.

723361 is a deficient number, since it is larger than the sum of its proper divisors (1).

723361 is an equidigital number, since it uses as much as digits as its factorization.

723361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 22.

The square root of 723361 is about 850.5063197884. The cubic root of 723361 is about 89.7673414607.

Adding to 723361 its reverse (163327), we get a palindrome (886688).

It can be divided in two parts, 723 and 361, that multiplied together give a triangular number (261003 = T₇₂₂).

The spelling of 723361 in words is "seven hundred twenty-three thousand, three hundred sixty-one".