68313109 has 2 divisors, whose sum is σ = 68313110. Its totient is φ = 68313108.

The previous prime is 68313103. The next prime is 68313121. The reversal of 68313109 is 90131386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64400625 + 3912484 = 8025^2 + 1978^2 .

It is a cyclic number.

It is not a de Polignac number, because 68313109 - 2¹⁵ = 68280341 is a prime.

It is a super-2 number, since 2×68313109² = 9333361722491762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68313103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34156554 + 34156555.

It is an arithmetic number, because the mean of its divisors is an integer number (34156555).

Almost surely, 2^68313109 is an apocalyptic number.

It is an amenable number.

68313109 is a deficient number, since it is larger than the sum of its proper divisors (1).

68313109 is an equidigital number, since it uses as much as digits as its factorization.

68313109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 68313109 is about 8265.1744688179. The cubic root of 68313109 is about 408.7910231375.

The spelling of 68313109 in words is "sixty-eight million, three hundred thirteen thousand, one hundred nine".