723643441 has 8 divisors (see below), whose sum is σ = 727510784. Its totient is φ = 719785440.

The previous prime is 723643433. The next prime is 723643451. The reversal of 723643441 is 144346327.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 723643441 - 2³ = 723643433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 723643397 and 723643406.

It is not an unprimeable number, because it can be changed into a prime (723643451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195181 + ... + 198853.

It is an arithmetic number, because the mean of its divisors is an integer number (90938848).

Almost surely, 2^723643441 is an apocalyptic number.

It is an amenable number.

723643441 is a deficient number, since it is larger than the sum of its proper divisors (3867343).

723643441 is a wasteful number, since it uses less digits than its factorization.

723643441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4671.

The product of its digits is 48384, while the sum is 34.

The square root of 723643441 is about 26900.6215727444. The cubic root of 723643441 is about 897.7902335421.

Adding to 723643441 its reverse (144346327), we get a palindrome (867989768).

The spelling of 723643441 in words is "seven hundred twenty-three million, six hundred forty-three thousand, four hundred forty-one".