68907649 has 2 divisors, whose sum is σ = 68907650. Its totient is φ = 68907648.

The previous prime is 68907589. The next prime is 68907667. The reversal of 68907649 is 94670986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58247424 + 10660225 = 7632^2 + 3265^2 .

It is a cyclic number.

It is not a de Polignac number, because 68907649 - 2¹¹ = 68905601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68907689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34453824 + 34453825.

It is an arithmetic number, because the mean of its divisors is an integer number (34453825).

Almost surely, 2^68907649 is an apocalyptic number.

It is an amenable number.

68907649 is a deficient number, since it is larger than the sum of its proper divisors (1).

68907649 is an equidigital number, since it uses as much as digits as its factorization.

68907649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 68907649 is about 8301.0631246847. The cubic root of 68907649 is about 409.9735239695.

The spelling of 68907649 in words is "sixty-eight million, nine hundred seven thousand, six hundred forty-nine".