68278897 has 2 divisors, whose sum is σ = 68278898. Its totient is φ = 68278896.

The previous prime is 68278879. The next prime is 68278933. The reversal of 68278897 is 79887286.

Together with previous prime (68278879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67914081 + 364816 = 8241^2 + 604^2 .

It is a cyclic number.

It is not a de Polignac number, because 68278897 - 2²³ = 59890289 is a prime.

It is not a weakly prime, because it can be changed into another prime (68278807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34139448 + 34139449.

It is an arithmetic number, because the mean of its divisors is an integer number (34139449).

Almost surely, 2^68278897 is an apocalyptic number.

It is an amenable number.

68278897 is a deficient number, since it is larger than the sum of its proper divisors (1).

68278897 is an equidigital number, since it uses as much as digits as its factorization.

68278897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2709504, while the sum is 55.

The square root of 68278897 is about 8263.1045618460. The cubic root of 68278897 is about 408.7227693082.

The spelling of 68278897 in words is "sixty-eight million, two hundred seventy-eight thousand, eight hundred ninety-seven".