68078357 has 2 divisors, whose sum is σ = 68078358. Its totient is φ = 68078356.

The previous prime is 68078333. The next prime is 68078359. The reversal of 68078357 is 75387086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50822641 + 17255716 = 7129^2 + 4154^2 .

It is a cyclic number.

It is not a de Polignac number, because 68078357 - 2¹² = 68074261 is a prime.

Together with 68078359, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68078359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34039178 + 34039179.

It is an arithmetic number, because the mean of its divisors is an integer number (34039179).

Almost surely, 2^68078357 is an apocalyptic number.

It is an amenable number.

68078357 is a deficient number, since it is larger than the sum of its proper divisors (1).

68078357 is an equidigital number, since it uses as much as digits as its factorization.

68078357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 68078357 is about 8250.9609743351. The cubic root of 68078357 is about 408.3222275845.

The spelling of 68078357 in words is "sixty-eight million, seventy-eight thousand, three hundred fifty-seven".