78341279 has 2 divisors, whose sum is σ = 78341280. Its totient is φ = 78341278.

The previous prime is 78341257. The next prime is 78341297. The reversal of 78341279 is 97214387.

Together with next prime (78341297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78341279 is a prime.

It is a super-2 number, since 2×78341279² = 12274711990711682, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78341239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39170639 + 39170640.

It is an arithmetic number, because the mean of its divisors is an integer number (39170640).

Almost surely, 2^78341279 is an apocalyptic number.

78341279 is a deficient number, since it is larger than the sum of its proper divisors (1).

78341279 is an equidigital number, since it uses as much as digits as its factorization.

78341279 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 78341279 is about 8851.0608968643. The cubic root of 78341279 is about 427.8881105458. Note that the first 3 decimals are identical.

The spelling of 78341279 in words is "seventy-eight million, three hundred forty-one thousand, two hundred seventy-nine".