68106257 has 2 divisors, whose sum is σ = 68106258. Its totient is φ = 68106256.

The previous prime is 68106223. The next prime is 68106263. The reversal of 68106257 is 75260186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47458321 + 20647936 = 6889^2 + 4544^2 .

It is a cyclic number.

It is not a de Polignac number, because 68106257 - 2¹⁴ = 68089873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68103257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34053128 + 34053129.

It is an arithmetic number, because the mean of its divisors is an integer number (34053129).

Almost surely, 2^68106257 is an apocalyptic number.

It is an amenable number.

68106257 is a deficient number, since it is larger than the sum of its proper divisors (1).

68106257 is an equidigital number, since it uses as much as digits as its factorization.

68106257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 68106257 is about 8252.6515133016. The cubic root of 68106257 is about 408.3779997601.

The spelling of 68106257 in words is "sixty-eight million, one hundred six thousand, two hundred fifty-seven".