68128937 has 2 divisors, whose sum is σ = 68128938. Its totient is φ = 68128936.

The previous prime is 68128919. The next prime is 68128961. The reversal of 68128937 is 73982186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40208281 + 27920656 = 6341^2 + 5284^2 .

It is a cyclic number.

It is not a de Polignac number, because 68128937 - 2¹⁸ = 67866793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68128037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34064468 + 34064469.

It is an arithmetic number, because the mean of its divisors is an integer number (34064469).

Almost surely, 2^68128937 is an apocalyptic number.

It is an amenable number.

68128937 is a deficient number, since it is larger than the sum of its proper divisors (1).

68128937 is an equidigital number, since it uses as much as digits as its factorization.

68128937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 68128937 is about 8254.0255027471. The cubic root of 68128937 is about 408.4233259192.

The spelling of 68128937 in words is "sixty-eight million, one hundred twenty-eight thousand, nine hundred thirty-seven".