78489143 has 2 divisors, whose sum is σ = 78489144. Its totient is φ = 78489142.

The previous prime is 78489113. The next prime is 78489161. The reversal of 78489143 is 34198487.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78489143 - 2¹⁰ = 78488119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78489094 and 78489103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78489113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39244571 + 39244572.

It is an arithmetic number, because the mean of its divisors is an integer number (39244572).

Almost surely, 2^78489143 is an apocalyptic number.

78489143 is a deficient number, since it is larger than the sum of its proper divisors (1).

78489143 is an equidigital number, since it uses as much as digits as its factorization.

78489143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 44.

The square root of 78489143 is about 8859.4098561925. The cubic root of 78489143 is about 428.1571448896.

The spelling of 78489143 in words is "seventy-eight million, four hundred eighty-nine thousand, one hundred forty-three".