725896681 has 2 divisors, whose sum is σ = 725896682. Its totient is φ = 725896680.

The previous prime is 725896679. The next prime is 725896733. The reversal of 725896681 is 186698527.

725896681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (725896733) can be obtained adding 725896681 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571640281 + 154256400 = 23909^2 + 12420^2 .

It is an emirp because it is prime and its reverse (186698527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 725896681 - 2¹ = 725896679 is a prime.

It is a super-2 number, since 2×725896681² = 1053851982973631522, which contains 22 as substring.

Together with 725896679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (725896601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362948340 + 362948341.

It is an arithmetic number, because the mean of its divisors is an integer number (362948341).

Almost surely, 2^725896681 is an apocalyptic number.

It is an amenable number.

725896681 is a deficient number, since it is larger than the sum of its proper divisors (1).

725896681 is an equidigital number, since it uses as much as digits as its factorization.

725896681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 52.

The square root of 725896681 is about 26942.4698385282. The cubic root of 725896681 is about 898.7210975287.

The spelling of 725896681 in words is "seven hundred twenty-five million, eight hundred ninety-six thousand, six hundred eighty-one".