725826989 has 2 divisors, whose sum is σ = 725826990. Its totient is φ = 725826988.

The previous prime is 725826943. The next prime is 725827001. The reversal of 725826989 is 989628527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 695113225 + 30713764 = 26365^2 + 5542^2 .

It is a cyclic number.

It is not a de Polignac number, because 725826989 - 2¹² = 725822893 is a prime.

It is a super-2 number, since 2×725826989² = 1053649635921612242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725826929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362913494 + 362913495.

It is an arithmetic number, because the mean of its divisors is an integer number (362913495).

Almost surely, 2^725826989 is an apocalyptic number.

It is an amenable number.

725826989 is a deficient number, since it is larger than the sum of its proper divisors (1).

725826989 is an equidigital number, since it uses as much as digits as its factorization.

725826989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 56.

The square root of 725826989 is about 26941.1764590932. The cubic root of 725826989 is about 898.6923350905.

The spelling of 725826989 in words is "seven hundred twenty-five million, eight hundred twenty-six thousand, nine hundred eighty-nine".