68974109 has 2 divisors, whose sum is σ = 68974110. Its totient is φ = 68974108.

The previous prime is 68974097. The next prime is 68974141. The reversal of 68974109 is 90147986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67404100 + 1570009 = 8210^2 + 1253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68974109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68974109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68974159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34487054 + 34487055.

It is an arithmetic number, because the mean of its divisors is an integer number (34487055).

Almost surely, 2^68974109 is an apocalyptic number.

It is an amenable number.

68974109 is a deficient number, since it is larger than the sum of its proper divisors (1).

68974109 is an equidigital number, since it uses as much as digits as its factorization.

68974109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 68974109 is about 8305.0652616340. The cubic root of 68974109 is about 410.1052852752.

The spelling of 68974109 in words is "sixty-eight million, nine hundred seventy-four thousand, one hundred nine".