78339143 has 2 divisors, whose sum is σ = 78339144. Its totient is φ = 78339142.

The previous prime is 78339119. The next prime is 78339161. The reversal of 78339143 is 34193387.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78339143 - 2¹⁶ = 78273607 is a prime.

It is a super-2 number, since 2×78339143² = 12274042651948898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78339097 and 78339106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78339103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39169571 + 39169572.

It is an arithmetic number, because the mean of its divisors is an integer number (39169572).

Almost surely, 2^78339143 is an apocalyptic number.

78339143 is a deficient number, since it is larger than the sum of its proper divisors (1).

78339143 is an equidigital number, since it uses as much as digits as its factorization.

78339143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 78339143 is about 8850.9402325403. The cubic root of 78339143 is about 427.8842216751.

The spelling of 78339143 in words is "seventy-eight million, three hundred thirty-nine thousand, one hundred forty-three".