775841993 has 2 divisors, whose sum is σ = 775841994. Its totient is φ = 775841992.

The previous prime is 775841939. The next prime is 775842013. The reversal of 775841993 is 399148577.

Together with previous prime (775841939) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 758892304 + 16949689 = 27548^2 + 4117^2 .

It is a cyclic number.

It is not a de Polignac number, because 775841993 - 2¹² = 775837897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (775841933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387920996 + 387920997.

It is an arithmetic number, because the mean of its divisors is an integer number (387920997).

Almost surely, 2^775841993 is an apocalyptic number.

It is an amenable number.

775841993 is a deficient number, since it is larger than the sum of its proper divisors (1).

775841993 is an equidigital number, since it uses as much as digits as its factorization.

775841993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 53.

The square root of 775841993 is about 27853.9403496166. The cubic root of 775841993 is about 918.8778035115.

The spelling of 775841993 in words is "seven hundred seventy-five million, eight hundred forty-one thousand, nine hundred ninety-three".