78500027 has 2 divisors, whose sum is σ = 78500028. Its totient is φ = 78500026.

The previous prime is 78500021. The next prime is 78500053. The reversal of 78500027 is 72000587.

It is a weak prime.

It is an emirp because it is prime and its reverse (72000587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78500027 - 2¹⁸ = 78237883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78500021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39250013 + 39250014.

It is an arithmetic number, because the mean of its divisors is an integer number (39250014).

Almost surely, 2^78500027 is an apocalyptic number.

78500027 is a deficient number, since it is larger than the sum of its proper divisors (1).

78500027 is an equidigital number, since it uses as much as digits as its factorization.

78500027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 78500027 is about 8860.0240970327. The cubic root of 78500027 is about 428.1769346626.

The spelling of 78500027 in words is "seventy-eight million, five hundred thousand, twenty-seven".