68616473 has 2 divisors, whose sum is σ = 68616474. Its totient is φ = 68616472.

The previous prime is 68616461. The next prime is 68616487. The reversal of 68616473 is 37461686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61042969 + 7573504 = 7813^2 + 2752^2 .

It is a cyclic number.

It is not a de Polignac number, because 68616473 - 2⁶ = 68616409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68616473.

It is not a weakly prime, because it can be changed into another prime (68616413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34308236 + 34308237.

It is an arithmetic number, because the mean of its divisors is an integer number (34308237).

Almost surely, 2^68616473 is an apocalyptic number.

It is an amenable number.

68616473 is a deficient number, since it is larger than the sum of its proper divisors (1).

68616473 is an equidigital number, since it uses as much as digits as its factorization.

68616473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 68616473 is about 8283.5060813643. The cubic root of 68616473 is about 409.3952476282.

The spelling of 68616473 in words is "sixty-eight million, six hundred sixteen thousand, four hundred seventy-three".