654630649 has 2 divisors, whose sum is σ = 654630650. Its totient is φ = 654630648.

The previous prime is 654630637. The next prime is 654630661. The reversal of 654630649 is 946036456.

It is a balanced prime because it is at equal distance from previous prime (654630637) and next prime (654630661).

It can be written as a sum of positive squares in only one way, i.e., 650250000 + 4380649 = 25500^2 + 2093^2 .

It is a cyclic number.

It is not a de Polignac number, because 654630649 - 2¹³ = 654622457 is a prime.

It is a super-2 number, since 2×654630649² = 857082573220322402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (654630349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327315324 + 327315325.

It is an arithmetic number, because the mean of its divisors is an integer number (327315325).

Almost surely, 2^654630649 is an apocalyptic number.

It is an amenable number.

654630649 is a deficient number, since it is larger than the sum of its proper divisors (1).

654630649 is an equidigital number, since it uses as much as digits as its factorization.

654630649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 654630649 is about 25585.7508977165. The cubic root of 654630649 is about 868.2912906169.

The spelling of 654630649 in words is "six hundred fifty-four million, six hundred thirty thousand, six hundred forty-nine".