775842043 has 2 divisors, whose sum is σ = 775842044. Its totient is φ = 775842042.

The previous prime is 775842013. The next prime is 775842083. The reversal of 775842043 is 340248577.

It is an a-pointer prime, because the next prime (775842083) can be obtained adding 775842043 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-775842043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 775841987 and 775842005.

It is not a weakly prime, because it can be changed into another prime (775842013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387921021 + 387921022.

It is an arithmetic number, because the mean of its divisors is an integer number (387921022).

Almost surely, 2^775842043 is an apocalyptic number.

775842043 is a deficient number, since it is larger than the sum of its proper divisors (1).

775842043 is an equidigital number, since it uses as much as digits as its factorization.

775842043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188160, while the sum is 40.

The square root of 775842043 is about 27853.9412471557. The cubic root of 775842043 is about 918.8778232508.

The spelling of 775842043 in words is "seven hundred seventy-five million, eight hundred forty-two thousand, forty-three".