8440785943 has 2 divisors, whose sum is σ = 8440785944. Its totient is φ = 8440785942.

The previous prime is 8440785931. The next prime is 8440785953. The reversal of 8440785943 is 3495870448.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8440785943 - 2⁵ = 8440785911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8440785953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4220392971 + 4220392972.

It is an arithmetic number, because the mean of its divisors is an integer number (4220392972).

Almost surely, 2^8440785943 is an apocalyptic number.

8440785943 is a deficient number, since it is larger than the sum of its proper divisors (1).

8440785943 is an equidigital number, since it uses as much as digits as its factorization.

8440785943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The square root of 8440785943 is about 91873.7500214289. The cubic root of 8440785943 is about 2036.0774573037.

The spelling of 8440785943 in words is "eight billion, four hundred forty million, seven hundred eighty-five thousand, nine hundred forty-three".