68256473 has 2 divisors, whose sum is σ = 68256474. Its totient is φ = 68256472.

The previous prime is 68256469. The next prime is 68256497. The reversal of 68256473 is 37465286.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56505289 + 11751184 = 7517^2 + 3428^2 .

It is a cyclic number.

It is not a de Polignac number, because 68256473 - 2² = 68256469 is a prime.

It is a super-2 number, since 2×68256473² = 9317892212799458, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68256473.

It is not a weakly prime, because it can be changed into another prime (68256973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34128236 + 34128237.

It is an arithmetic number, because the mean of its divisors is an integer number (34128237).

Almost surely, 2^68256473 is an apocalyptic number.

It is an amenable number.

68256473 is a deficient number, since it is larger than the sum of its proper divisors (1).

68256473 is an equidigital number, since it uses as much as digits as its factorization.

68256473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 41.

The square root of 68256473 is about 8261.7475754225. The cubic root of 68256473 is about 408.6780204751.

The spelling of 68256473 in words is "sixty-eight million, two hundred fifty-six thousand, four hundred seventy-three".