68681983 has 2 divisors, whose sum is σ = 68681984. Its totient is φ = 68681982.

The previous prime is 68681927. The next prime is 68682007. The reversal of 68681983 is 38918686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68681983 - 2⁹ = 68681471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68681783) 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, 34340991 + 34340992.

It is an arithmetic number, because the mean of its divisors is an integer number (34340992).

Almost surely, 2^68681983 is an apocalyptic number.

68681983 is a deficient number, since it is larger than the sum of its proper divisors (1).

68681983 is an equidigital number, since it uses as much as digits as its factorization.

68681983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 49.

The square root of 68681983 is about 8287.4593814993. The cubic root of 68681983 is about 409.5254930874.

The spelling of 68681983 in words is "sixty-eight million, six hundred eighty-one thousand, nine hundred eighty-three".