263984533 has 2 divisors, whose sum is σ = 263984534. Its totient is φ = 263984532.

The previous prime is 263984509. The next prime is 263984549. The reversal of 263984533 is 335489362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254785444 + 9199089 = 15962^2 + 3033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263984533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 263984533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263984563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131992266 + 131992267.

It is an arithmetic number, because the mean of its divisors is an integer number (131992267).

Almost surely, 2^263984533 is an apocalyptic number.

It is an amenable number.

263984533 is a deficient number, since it is larger than the sum of its proper divisors (1).

263984533 is an equidigital number, since it uses as much as digits as its factorization.

263984533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 43.

The square root of 263984533 is about 16247.6008382776. The cubic root of 263984533 is about 641.4943377410.

The spelling of 263984533 in words is "two hundred sixty-three million, nine hundred eighty-four thousand, five hundred thirty-three".