68601649 has 2 divisors, whose sum is σ = 68601650. Its totient is φ = 68601648.

The previous prime is 68601629. The next prime is 68601671. The reversal of 68601649 is 94610686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64915249 + 3686400 = 8057^2 + 1920^2 .

It is a cyclic number.

It is not a de Polignac number, because 68601649 - 2⁷ = 68601521 is a prime.

It is not a weakly prime, because it can be changed into another prime (68601619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34300824 + 34300825.

It is an arithmetic number, because the mean of its divisors is an integer number (34300825).

Almost surely, 2^68601649 is an apocalyptic number.

It is an amenable number.

68601649 is a deficient number, since it is larger than the sum of its proper divisors (1).

68601649 is an equidigital number, since it uses as much as digits as its factorization.

68601649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 68601649 is about 8282.6112428388. The cubic root of 68601649 is about 409.3657633951.

The spelling of 68601649 in words is "sixty-eight million, six hundred one thousand, six hundred forty-nine".