78860143 has 2 divisors, whose sum is σ = 78860144. Its totient is φ = 78860142.

The previous prime is 78860099. The next prime is 78860149. The reversal of 78860143 is 34106887.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (34106887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78860143 - 2¹³ = 78851951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78860149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39430071 + 39430072.

It is an arithmetic number, because the mean of its divisors is an integer number (39430072).

Almost surely, 2^78860143 is an apocalyptic number.

78860143 is a deficient number, since it is larger than the sum of its proper divisors (1).

78860143 is an equidigital number, since it uses as much as digits as its factorization.

78860143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 78860143 is about 8880.3233612296. The cubic root of 78860143 is about 428.8306846655.

It can be divided in two parts, 78860 and 143, that added together give a triangular number (79003 = T₃₉₇).

The spelling of 78860143 in words is "seventy-eight million, eight hundred sixty thousand, one hundred forty-three".