78094517 has 2 divisors, whose sum is σ = 78094518. Its totient is φ = 78094516.

The previous prime is 78094507. The next prime is 78094519. The reversal of 78094517 is 71549087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40627876 + 37466641 = 6374^2 + 6121^2 .

It is a cyclic number.

It is not a de Polignac number, because 78094517 - 2¹⁰ = 78093493 is a prime.

Together with 78094519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78094519) 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, 39047258 + 39047259.

It is an arithmetic number, because the mean of its divisors is an integer number (39047259).

Almost surely, 2^78094517 is an apocalyptic number.

It is an amenable number.

78094517 is a deficient number, since it is larger than the sum of its proper divisors (1).

78094517 is an equidigital number, since it uses as much as digits as its factorization.

78094517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 78094517 is about 8837.1102177126. The cubic root of 78094517 is about 427.4383792263.

The spelling of 78094517 in words is "seventy-eight million, ninety-four thousand, five hundred seventeen".