78094019 has 2 divisors, whose sum is σ = 78094020. Its totient is φ = 78094018.

The previous prime is 78094007. The next prime is 78094097. The reversal of 78094019 is 91049087.

It is a weak prime.

It is an emirp because it is prime and its reverse (91049087) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78094019 is a prime.

It is a super-2 number, since 2×78094019² = 12197351607144722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78094319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39047009 + 39047010.

It is an arithmetic number, because the mean of its divisors is an integer number (39047010).

Almost surely, 2^78094019 is an apocalyptic number.

78094019 is a deficient number, since it is larger than the sum of its proper divisors (1).

78094019 is an equidigital number, since it uses as much as digits as its factorization.

78094019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 78094019 is about 8837.0820410359. The cubic root of 78094019 is about 427.4374706488.

The spelling of 78094019 in words is "seventy-eight million, ninety-four thousand, nineteen".