263984447 has 2 divisors, whose sum is σ = 263984448. Its totient is φ = 263984446.

The previous prime is 263984443. The next prime is 263984509. The reversal of 263984447 is 744489362.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263984447 - 2² = 263984443 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263984443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131992223 + 131992224.

It is an arithmetic number, because the mean of its divisors is an integer number (131992224).

Almost surely, 2^263984447 is an apocalyptic number.

263984447 is a deficient number, since it is larger than the sum of its proper divisors (1).

263984447 is an equidigital number, since it uses as much as digits as its factorization.

263984447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 47.

The square root of 263984447 is about 16247.5981917328. The cubic root of 263984447 is about 641.4942680797.

The spelling of 263984447 in words is "two hundred sixty-three million, nine hundred eighty-four thousand, four hundred forty-seven".