723425281 has 2 divisors, whose sum is σ = 723425282. Its totient is φ = 723425280.

The previous prime is 723425239. The next prime is 723425299. The reversal of 723425281 is 182524327.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 487526400 + 235898881 = 22080^2 + 15359^2 .

It is an emirp because it is prime and its reverse (182524327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 723425281 - 2⁹ = 723424769 is a prime.

It is a super-2 number, since 2×723425281² = 1046688274379857922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (723425201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361712640 + 361712641.

It is an arithmetic number, because the mean of its divisors is an integer number (361712641).

Almost surely, 2^723425281 is an apocalyptic number.

It is an amenable number.

723425281 is a deficient number, since it is larger than the sum of its proper divisors (1).

723425281 is an equidigital number, since it uses as much as digits as its factorization.

723425281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 34.

The square root of 723425281 is about 26896.5663421932. The cubic root of 723425281 is about 897.7000042054.

The spelling of 723425281 in words is "seven hundred twenty-three million, four hundred twenty-five thousand, two hundred eighty-one".