723273641 has 4 divisors (see below), whose sum is σ = 723951300. Its totient is φ = 722595984.

The previous prime is 723273637. The next prime is 723273667. The reversal of 723273641 is 146372327.

723273641 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 an emirpimes, since its reverse is a distinct semiprime: 146372327 = 167 ⋅876481.

It can be written as a sum of positive squares in 2 ways, for example, as 311346025 + 411927616 = 17645^2 + 20296^2 .

It is a cyclic number.

It is not a de Polignac number, because 723273641 - 2² = 723273637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (723273671) 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, 337226 + ... + 339363.

It is an arithmetic number, because the mean of its divisors is an integer number (180987825).

Almost surely, 2^723273641 is an apocalyptic number.

It is an amenable number.

723273641 is a deficient number, since it is larger than the sum of its proper divisors (677659).

723273641 is a wasteful number, since it uses less digits than its factorization.

723273641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677658.

The product of its digits is 42336, while the sum is 35.

The square root of 723273641 is about 26893.7472472692. The cubic root of 723273641 is about 897.6372763538.

The spelling of 723273641 in words is "seven hundred twenty-three million, two hundred seventy-three thousand, six hundred forty-one".