723946 has 4 divisors (see below), whose sum is σ = 1085922. Its totient is φ = 361972.

The previous prime is 723923. The next prime is 723949. The reversal of 723946 is 649327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 649327 = 7 ⋅92761.

It can be written as a sum of positive squares in only one way, i.e., 555025 + 168921 = 745^2 + 411^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (723949) 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 as a sum of consecutive naturals, namely, 180985 + ... + 180988.

2⁷²³⁹⁴⁶ is an apocalyptic number.

723946 is a deficient number, since it is larger than the sum of its proper divisors (361976).

723946 is a wasteful number, since it uses less digits than its factorization.

723946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361975.

The product of its digits is 9072, while the sum is 31.

The square root of 723946 is about 850.8501630722. The cubic root of 723946 is about 89.7915339661.

The spelling of 723946 in words is "seven hundred twenty-three thousand, nine hundred forty-six".