723798081 has 6 divisors (see below), whose sum is σ = 1045486130. Its totient is φ = 482532048.

The previous prime is 723798067. The next prime is 723798083. The reversal of 723798081 is 180897327.

It can be written as a sum of positive squares in only one way, i.e., 715295025 + 8503056 = 26745^2 + 2916^2 .

It is not a de Polignac number, because 723798081 - 2¹⁴ = 723781697 is a prime.

It is a super-2 number, since 2×723798081² = 1047767324118565122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (723798083) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40210996 + ... + 40211013.

Almost surely, 2^723798081 is an apocalyptic number.

It is an amenable number.

723798081 is a deficient number, since it is larger than the sum of its proper divisors (321688049).

723798081 is a wasteful number, since it uses less digits than its factorization.

723798081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80422015 (or 80422012 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 723798081 is about 26903.4957022317. The cubic root of 723798081 is about 897.8541805016.

The spelling of 723798081 in words is "seven hundred twenty-three million, seven hundred ninety-eight thousand, eighty-one".