263120257 has 2 divisors, whose sum is σ = 263120258. Its totient is φ = 263120256.

The previous prime is 263120233. The next prime is 263120261. The reversal of 263120257 is 752021362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253159921 + 9960336 = 15911^2 + 3156^2 .

It is a cyclic number.

It is not a de Polignac number, because 263120257 - 2⁷ = 263120129 is a prime.

It is not a weakly prime, because it can be changed into another prime (263129257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131560128 + 131560129.

It is an arithmetic number, because the mean of its divisors is an integer number (131560129).

Almost surely, 2^263120257 is an apocalyptic number.

It is an amenable number.

263120257 is a deficient number, since it is larger than the sum of its proper divisors (1).

263120257 is an equidigital number, since it uses as much as digits as its factorization.

263120257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 263120257 is about 16220.9819986337. The cubic root of 263120257 is about 640.7934957684.

The spelling of 263120257 in words is "two hundred sixty-three million, one hundred twenty thousand, two hundred fifty-seven".