68131633 has 2 divisors, whose sum is σ = 68131634. Its totient is φ = 68131632.

The previous prime is 68131621. The next prime is 68131639. The reversal of 68131633 is 33613186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67699984 + 431649 = 8228^2 + 657^2 .

It is a cyclic number.

It is not a de Polignac number, because 68131633 - 2⁵ = 68131601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68131595 and 68131604.

It is not a weakly prime, because it can be changed into another prime (68131639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34065816 + 34065817.

It is an arithmetic number, because the mean of its divisors is an integer number (34065817).

Almost surely, 2^68131633 is an apocalyptic number.

It is an amenable number.

68131633 is a deficient number, since it is larger than the sum of its proper divisors (1).

68131633 is an equidigital number, since it uses as much as digits as its factorization.

68131633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 68131633 is about 8254.1888153834. The cubic root of 68131633 is about 408.4287132275.

The spelling of 68131633 in words is "sixty-eight million, one hundred thirty-one thousand, six hundred thirty-three".