78725243 has 2 divisors, whose sum is σ = 78725244. Its totient is φ = 78725242.

The previous prime is 78725219. The next prime is 78725263. The reversal of 78725243 is 34252787.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78725243 - 2¹⁴ = 78708859 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 78725197 and 78725206.

It is not a weakly prime, because it can be changed into another prime (78725203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39362621 + 39362622.

It is an arithmetic number, because the mean of its divisors is an integer number (39362622).

Almost surely, 2^78725243 is an apocalyptic number.

78725243 is a deficient number, since it is larger than the sum of its proper divisors (1).

78725243 is an equidigital number, since it uses as much as digits as its factorization.

78725243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 38.

The square root of 78725243 is about 8872.7246660764. The cubic root of 78725243 is about 428.5860225136.

The spelling of 78725243 in words is "seventy-eight million, seven hundred twenty-five thousand, two hundred forty-three".