78560189 has 2 divisors, whose sum is σ = 78560190. Its totient is φ = 78560188.

The previous prime is 78560173. The next prime is 78560197. The reversal of 78560189 is 98106587.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42680089 + 35880100 = 6533^2 + 5990^2 .

It is a cyclic number.

It is not a de Polignac number, because 78560189 - 2⁴ = 78560173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78560089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39280094 + 39280095.

It is an arithmetic number, because the mean of its divisors is an integer number (39280095).

Almost surely, 2^78560189 is an apocalyptic number.

It is an amenable number.

78560189 is a deficient number, since it is larger than the sum of its proper divisors (1).

78560189 is an equidigital number, since it uses as much as digits as its factorization.

78560189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 78560189 is about 8863.4185842710. The cubic root of 78560189 is about 428.2862909001.

The spelling of 78560189 in words is "seventy-eight million, five hundred sixty thousand, one hundred eighty-nine".