654733649 has 2 divisors, whose sum is σ = 654733650. Its totient is φ = 654733648.

The previous prime is 654733643. The next prime is 654733661. The reversal of 654733649 is 946337456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 572740624 + 81993025 = 23932^2 + 9055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654733649 is a prime.

It is a super-2 number, since 2×654733649² = 857352302265710402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (654733643) 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, 327366824 + 327366825.

It is an arithmetic number, because the mean of its divisors is an integer number (327366825).

Almost surely, 2^654733649 is an apocalyptic number.

It is an amenable number.

654733649 is a deficient number, since it is larger than the sum of its proper divisors (1).

654733649 is an equidigital number, since it uses as much as digits as its factorization.

654733649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 47.

The square root of 654733649 is about 25587.7636576548. The cubic root of 654733649 is about 868.3368273955.

The spelling of 654733649 in words is "six hundred fifty-four million, seven hundred thirty-three thousand, six hundred forty-nine".