78341297 has 2 divisors, whose sum is σ = 78341298. Its totient is φ = 78341296.

The previous prime is 78341279. The next prime is 78341299. The reversal of 78341297 is 79214387.

Together with previous prime (78341279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65674816 + 12666481 = 8104^2 + 3559^2 .

It is a cyclic number.

It is not a de Polignac number, because 78341297 - 2⁶ = 78341233 is a prime.

It is a super-2 number, since 2×78341297² = 12274717631284418, which contains 22 as substring.

Together with 78341299, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78341299) 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, 39170648 + 39170649.

It is an arithmetic number, because the mean of its divisors is an integer number (39170649).

Almost surely, 2^78341297 is an apocalyptic number.

It is an amenable number.

78341297 is a deficient number, since it is larger than the sum of its proper divisors (1).

78341297 is an equidigital number, since it uses as much as digits as its factorization.

78341297 is an odious number, because the sum of its binary digits is odd.

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

The square root of 78341297 is about 8851.0619136915. The cubic root of 78341297 is about 427.8881433169. Note that the first 3 decimals are identical.

The spelling of 78341297 in words is "seventy-eight million, three hundred forty-one thousand, two hundred ninety-seven".