775344047 has 2 divisors, whose sum is σ = 775344048. Its totient is φ = 775344046.

The previous prime is 775344043. The next prime is 775344061. The reversal of 775344047 is 740443577.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 775344047 - 2² = 775344043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 775343995 and 775344013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (775344043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387672023 + 387672024.

It is an arithmetic number, because the mean of its divisors is an integer number (387672024).

Almost surely, 2^775344047 is an apocalyptic number.

775344047 is a deficient number, since it is larger than the sum of its proper divisors (1).

775344047 is an equidigital number, since it uses as much as digits as its factorization.

775344047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 329280, while the sum is 41.

The square root of 775344047 is about 27845.0003950440. Note that the first 3 decimals coincide. The cubic root of 775344047 is about 918.6811786603.

The spelling of 775344047 in words is "seven hundred seventy-five million, three hundred forty-four thousand, forty-seven".