68309767 has 2 divisors, whose sum is σ = 68309768. Its totient is φ = 68309766.

The previous prime is 68309749. The next prime is 68309809. The reversal of 68309767 is 76790386.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68309767 - 2¹⁹ = 67785479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68300767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34154883 + 34154884.

It is an arithmetic number, because the mean of its divisors is an integer number (34154884).

Almost surely, 2^68309767 is an apocalyptic number.

68309767 is a deficient number, since it is larger than the sum of its proper divisors (1).

68309767 is an equidigital number, since it uses as much as digits as its factorization.

68309767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 68309767 is about 8264.9722927545. The cubic root of 68309767 is about 408.7843567651.

The spelling of 68309767 in words is "sixty-eight million, three hundred nine thousand, seven hundred sixty-seven".