263494471 has 2 divisors, whose sum is σ = 263494472. Its totient is φ = 263494470.

The previous prime is 263494447. The next prime is 263494477. The reversal of 263494471 is 174494362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 263494471 - 2⁹ = 263493959 is a prime.

It is a super-3 number, since 3×263494471³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263494477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131747235 + 131747236.

It is an arithmetic number, because the mean of its divisors is an integer number (131747236).

Almost surely, 2^263494471 is an apocalyptic number.

263494471 is a deficient number, since it is larger than the sum of its proper divisors (1).

263494471 is an equidigital number, since it uses as much as digits as its factorization.

263494471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 40.

The square root of 263494471 is about 16232.5127752914. The cubic root of 263494471 is about 641.0971342517.

The spelling of 263494471 in words is "two hundred sixty-three million, four hundred ninety-four thousand, four hundred seventy-one".