654550549 has 2 divisors, whose sum is σ = 654550550. Its totient is φ = 654550548.

The previous prime is 654550511. The next prime is 654550571. The reversal of 654550549 is 945055456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 450203524 + 204347025 = 21218^2 + 14295^2 .

It is a cyclic number.

It is not a de Polignac number, because 654550549 - 2¹⁷ = 654419477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654556549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327275274 + 327275275.

It is an arithmetic number, because the mean of its divisors is an integer number (327275275).

Almost surely, 2^654550549 is an apocalyptic number.

It is an amenable number.

654550549 is a deficient number, since it is larger than the sum of its proper divisors (1).

654550549 is an equidigital number, since it uses as much as digits as its factorization.

654550549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540000, while the sum is 43.

The square root of 654550549 is about 25584.1855254374. The cubic root of 654550549 is about 868.2558747330.

The spelling of 654550549 in words is "six hundred fifty-four million, five hundred fifty thousand, five hundred forty-nine".