723338081 has 2 divisors, whose sum is σ = 723338082. Its totient is φ = 723338080.

The previous prime is 723338071. The next prime is 723338087. The reversal of 723338081 is 180833327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 515517025 + 207821056 = 22705^2 + 14416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-723338081 is a prime.

It is a super-2 number, since 2×723338081² = 1046435958849525122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (723338087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361669040 + 361669041.

It is an arithmetic number, because the mean of its divisors is an integer number (361669041).

Almost surely, 2^723338081 is an apocalyptic number.

It is an amenable number.

723338081 is a deficient number, since it is larger than the sum of its proper divisors (1).

723338081 is an equidigital number, since it uses as much as digits as its factorization.

723338081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 723338081 is about 26894.9452685816. The cubic root of 723338081 is about 897.6639338662.

The spelling of 723338081 in words is "seven hundred twenty-three million, three hundred thirty-eight thousand, eighty-one".