68223937 has 2 divisors, whose sum is σ = 68223938. Its totient is φ = 68223936.

The previous prime is 68223923. The next prime is 68223943. The reversal of 68223937 is 73932286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66080641 + 2143296 = 8129^2 + 1464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68223937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68223937.

It is not a weakly prime, because it can be changed into another prime (68223917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34111968 + 34111969.

It is an arithmetic number, because the mean of its divisors is an integer number (34111969).

Almost surely, 2^68223937 is an apocalyptic number.

It is an amenable number.

68223937 is a deficient number, since it is larger than the sum of its proper divisors (1).

68223937 is an equidigital number, since it uses as much as digits as its factorization.

68223937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 68223937 is about 8259.7782657890. The cubic root of 68223937 is about 408.6130749308.

It can be divided in two parts, 682239 and 37, that added together give a square (682276 = 826²).

The spelling of 68223937 in words is "sixty-eight million, two hundred twenty-three thousand, nine hundred thirty-seven".