263795689 has 2 divisors, whose sum is σ = 263795690. Its totient is φ = 263795688.

The previous prime is 263795627. The next prime is 263795699. The reversal of 263795689 is 986597362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 234549225 + 29246464 = 15315^2 + 5408^2 .

It is a cyclic number.

It is not a de Polignac number, because 263795689 - 2²⁵ = 230241257 is a prime.

It is not a weakly prime, because it can be changed into another prime (263795699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131897844 + 131897845.

It is an arithmetic number, because the mean of its divisors is an integer number (131897845).

Almost surely, 2^263795689 is an apocalyptic number.

It is an amenable number.

263795689 is a deficient number, since it is larger than the sum of its proper divisors (1).

263795689 is an equidigital number, since it uses as much as digits as its factorization.

263795689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 55.

The square root of 263795689 is about 16241.7883559662. The cubic root of 263795689 is about 641.3413347681.

The spelling of 263795689 in words is "two hundred sixty-three million, seven hundred ninety-five thousand, six hundred eighty-nine".