68235649 has 2 divisors, whose sum is σ = 68235650. Its totient is φ = 68235648.

The previous prime is 68235623. The next prime is 68235653. The reversal of 68235649 is 94653286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68178049 + 57600 = 8257^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 68235649 - 2⁵ = 68235617 is a prime.

It is a super-2 number, since 2×68235649² = 9312207588902402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68235679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34117824 + 34117825.

It is an arithmetic number, because the mean of its divisors is an integer number (34117825).

Almost surely, 2^68235649 is an apocalyptic number.

It is an amenable number.

68235649 is a deficient number, since it is larger than the sum of its proper divisors (1).

68235649 is an equidigital number, since it uses as much as digits as its factorization.

68235649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 43.

The square root of 68235649 is about 8260.4872132339. The cubic root of 68235649 is about 408.6364557886.

The spelling of 68235649 in words is "sixty-eight million, two hundred thirty-five thousand, six hundred forty-nine".