723973 has 2 divisors, whose sum is σ = 723974. Its totient is φ = 723972.

The previous prime is 723967. The next prime is 723977. The reversal of 723973 is 379327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 471969 + 252004 = 687^2 + 502^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-723973 is a prime.

It is a d-powerful number, because it can be written as 7 + 2¹⁷ + 9⁵ + 3 + 7⁴ + 3¹² .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361986 + 361987.

It is an arithmetic number, because the mean of its divisors is an integer number (361987).

2⁷²³⁹⁷³ is an apocalyptic number.

It is an amenable number.

723973 is a deficient number, since it is larger than the sum of its proper divisors (1).

723973 is an equidigital number, since it uses as much as digits as its factorization.

723973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7938, while the sum is 31.

The square root of 723973 is about 850.8660294077. The cubic root of 723973 is about 89.7926502286.

The spelling of 723973 in words is "seven hundred twenty-three thousand, nine hundred seventy-three".