654406549 has 2 divisors, whose sum is σ = 654406550. Its totient is φ = 654406548.

The previous prime is 654406513. The next prime is 654406561. The reversal of 654406549 is 945604456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614147524 + 40259025 = 24782^2 + 6345^2 .

It is a cyclic number.

It is not a de Polignac number, because 654406549 - 2¹¹ = 654404501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654406589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327203274 + 327203275.

It is an arithmetic number, because the mean of its divisors is an integer number (327203275).

Almost surely, 2^654406549 is an apocalyptic number.

It is an amenable number.

654406549 is a deficient number, since it is larger than the sum of its proper divisors (1).

654406549 is an equidigital number, since it uses as much as digits as its factorization.

654406549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 43.

The square root of 654406549 is about 25581.3711321344. The cubic root of 654406549 is about 868.1921984613.

The spelling of 654406549 in words is "six hundred fifty-four million, four hundred six thousand, five hundred forty-nine".