68400797 has 2 divisors, whose sum is σ = 68400798. Its totient is φ = 68400796.

The previous prime is 68400767. The next prime is 68400823. The reversal of 68400797 is 79700486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61293241 + 7107556 = 7829^2 + 2666^2 .

It is a cyclic number.

It is not a de Polignac number, because 68400797 - 2²⁰ = 67352221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68400727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34200398 + 34200399.

It is an arithmetic number, because the mean of its divisors is an integer number (34200399).

Almost surely, 2^68400797 is an apocalyptic number.

It is an amenable number.

68400797 is a deficient number, since it is larger than the sum of its proper divisors (1).

68400797 is an equidigital number, since it uses as much as digits as its factorization.

68400797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 68400797 is about 8270.4774348281. The cubic root of 68400797 is about 408.9658589835.

The spelling of 68400797 in words is "sixty-eight million, four hundred thousand, seven hundred ninety-seven".