263777897 has 2 divisors, whose sum is σ = 263777898. Its totient is φ = 263777896.

The previous prime is 263777879. The next prime is 263777951. The reversal of 263777897 is 798777362.

Together with previous prime (263777879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 258920281 + 4857616 = 16091^2 + 2204^2 .

It is a cyclic number.

It is not a de Polignac number, because 263777897 - 2¹² = 263773801 is a prime.

It is not a weakly prime, because it can be changed into another prime (263777807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131888948 + 131888949.

It is an arithmetic number, because the mean of its divisors is an integer number (131888949).

Almost surely, 2^263777897 is an apocalyptic number.

It is an amenable number.

263777897 is a deficient number, since it is larger than the sum of its proper divisors (1).

263777897 is an equidigital number, since it uses as much as digits as its factorization.

263777897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6223392, while the sum is 56.

The square root of 263777897 is about 16241.2406237947. The cubic root of 263777897 is about 641.3269157789.

The spelling of 263777897 in words is "two hundred sixty-three million, seven hundred seventy-seven thousand, eight hundred ninety-seven".