68218937 has 2 divisors, whose sum is σ = 68218938. Its totient is φ = 68218936.

The previous prime is 68218921. The next prime is 68218961. The reversal of 68218937 is 73981286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64818601 + 3400336 = 8051^2 + 1844^2 .

It is a cyclic number.

It is not a de Polignac number, because 68218937 - 2⁴ = 68218921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68218907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34109468 + 34109469.

It is an arithmetic number, because the mean of its divisors is an integer number (34109469).

Almost surely, 2^68218937 is an apocalyptic number.

It is an amenable number.

68218937 is a deficient number, since it is larger than the sum of its proper divisors (1).

68218937 is an equidigital number, since it uses as much as digits as its factorization.

68218937 is an evil number, because the sum of its binary digits is even.

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

The square root of 68218937 is about 8259.4755886799. The cubic root of 68218937 is about 408.6030925338.

The spelling of 68218937 in words is "sixty-eight million, two hundred eighteen thousand, nine hundred thirty-seven".