68728763 has 2 divisors, whose sum is σ = 68728764. Its totient is φ = 68728762.

The previous prime is 68728741. The next prime is 68728771. The reversal of 68728763 is 36782786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68728763 - 2⁸ = 68728507 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (68728733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34364381 + 34364382.

It is an arithmetic number, because the mean of its divisors is an integer number (34364382).

Almost surely, 2^68728763 is an apocalyptic number.

68728763 is a deficient number, since it is larger than the sum of its proper divisors (1).

68728763 is an equidigital number, since it uses as much as digits as its factorization.

68728763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 47.

The square root of 68728763 is about 8290.2812376903. The cubic root of 68728763 is about 409.6184493179.

The spelling of 68728763 in words is "sixty-eight million, seven hundred twenty-eight thousand, seven hundred sixty-three".