775390243 has 2 divisors, whose sum is σ = 775390244. Its totient is φ = 775390242.

The previous prime is 775390229. The next prime is 775390261. The reversal of 775390243 is 342093577.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 775390243 - 2⁵ = 775390211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 775390196 and 775390205.

It is not a weakly prime, because it can be changed into another prime (775390943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387695121 + 387695122.

It is an arithmetic number, because the mean of its divisors is an integer number (387695122).

Almost surely, 2^775390243 is an apocalyptic number.

775390243 is a deficient number, since it is larger than the sum of its proper divisors (1).

775390243 is an equidigital number, since it uses as much as digits as its factorization.

775390243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 40.

The square root of 775390243 is about 27845.8299032369. The cubic root of 775390243 is about 918.6994237018.

The spelling of 775390243 in words is "seven hundred seventy-five million, three hundred ninety thousand, two hundred forty-three".