1678085243 has 2 divisors, whose sum is σ = 1678085244. Its totient is φ = 1678085242.

The previous prime is 1678085219. The next prime is 1678085291. The reversal of 1678085243 is 3425808761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1678085243 - 2⁶ = 1678085179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1678085194 and 1678085203.

It is not a weakly prime, because it can be changed into another prime (1678082243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839042621 + 839042622.

It is an arithmetic number, because the mean of its divisors is an integer number (839042622).

Almost surely, 2^1678085243 is an apocalyptic number.

1678085243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1678085243 is an equidigital number, since it uses as much as digits as its factorization.

1678085243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 1678085243 is about 40964.4387609546. The cubic root of 1678085243 is about 1188.3325852848.

The spelling of 1678085243 in words is "one billion, six hundred seventy-eight million, eighty-five thousand, two hundred forty-three".