78097601 has 2 divisors, whose sum is σ = 78097602. Its totient is φ = 78097600.

The previous prime is 78097561. The next prime is 78097681. The reversal of 78097601 is 10679087.

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., 77457601 + 640000 = 8801^2 + 800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78097601 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (78097681) 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, 39048800 + 39048801.

It is an arithmetic number, because the mean of its divisors is an integer number (39048801).

Almost surely, 2^78097601 is an apocalyptic number.

It is an amenable number.

78097601 is a deficient number, since it is larger than the sum of its proper divisors (1).

78097601 is an equidigital number, since it uses as much as digits as its factorization.

78097601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 78097601 is about 8837.2847074200. The cubic root of 78097601 is about 427.4440057528. Note that the first 3 decimals are identical.

The spelling of 78097601 in words is "seventy-eight million, ninety-seven thousand, six hundred one".