548403689 has 2 divisors, whose sum is σ = 548403690. Its totient is φ = 548403688.

The previous prime is 548403683. The next prime is 548403703. The reversal of 548403689 is 986304845.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 547934464 + 469225 = 23408^2 + 685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-548403689 is a prime.

It is a super-2 number, since 2×548403689² = 601493212217617442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (548403683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274201844 + 274201845.

It is an arithmetic number, because the mean of its divisors is an integer number (274201845).

Almost surely, 2^548403689 is an apocalyptic number.

It is an amenable number.

548403689 is a deficient number, since it is larger than the sum of its proper divisors (1).

548403689 is an equidigital number, since it uses as much as digits as its factorization.

548403689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 548403689 is about 23418.0206038000. The cubic root of 548403689 is about 818.5278409428.

The spelling of 548403689 in words is "five hundred forty-eight million, four hundred three thousand, six hundred eighty-nine".