68722697 has 2 divisors, whose sum is σ = 68722698. Its totient is φ = 68722696.

The previous prime is 68722681. The next prime is 68722699. The reversal of 68722697 is 79622786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54007801 + 14714896 = 7349^2 + 3836^2 .

It is a cyclic number.

It is not a de Polignac number, because 68722697 - 2⁴ = 68722681 is a prime.

Together with 68722699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68722699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34361348 + 34361349.

It is an arithmetic number, because the mean of its divisors is an integer number (34361349).

Almost surely, 2^68722697 is an apocalyptic number.

It is an amenable number.

68722697 is a deficient number, since it is larger than the sum of its proper divisors (1).

68722697 is an equidigital number, since it uses as much as digits as its factorization.

68722697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 47.

The square root of 68722697 is about 8289.9153795440. The cubic root of 68722697 is about 409.6063979898.

The spelling of 68722697 in words is "sixty-eight million, seven hundred twenty-two thousand, six hundred ninety-seven".