548567989 has 2 divisors, whose sum is σ = 548567990. Its totient is φ = 548567988.

The previous prime is 548567983. The next prime is 548568037. The reversal of 548567989 is 989765845.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325513764 + 223054225 = 18042^2 + 14935^2 .

It is a cyclic number.

It is not a de Polignac number, because 548567989 - 2¹³ = 548559797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (548567983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274283994 + 274283995.

It is an arithmetic number, because the mean of its divisors is an integer number (274283995).

Almost surely, 2^548567989 is an apocalyptic number.

It is an amenable number.

548567989 is a deficient number, since it is larger than the sum of its proper divisors (1).

548567989 is an equidigital number, since it uses as much as digits as its factorization.

548567989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21772800, while the sum is 61.

The square root of 548567989 is about 23421.5283233183. The cubic root of 548567989 is about 818.6095755597.

The spelling of 548567989 in words is "five hundred forty-eight million, five hundred sixty-seven thousand, nine hundred eighty-nine".