263361457 has 2 divisors, whose sum is σ = 263361458. Its totient is φ = 263361456.

The previous prime is 263361437. The next prime is 263361473. The reversal of 263361457 is 754163362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254593936 + 8767521 = 15956^2 + 2961^2 .

It is a cyclic number.

It is not a de Polignac number, because 263361457 - 2²³ = 254972849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (263361437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131680728 + 131680729.

It is an arithmetic number, because the mean of its divisors is an integer number (131680729).

Almost surely, 2^263361457 is an apocalyptic number.

It is an amenable number.

263361457 is a deficient number, since it is larger than the sum of its proper divisors (1).

263361457 is an equidigital number, since it uses as much as digits as its factorization.

263361457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 37.

The square root of 263361457 is about 16228.4151105399. The cubic root of 263361457 is about 640.9892392017.

The spelling of 263361457 in words is "two hundred sixty-three million, three hundred sixty-one thousand, four hundred fifty-seven".