263641783 has 2 divisors, whose sum is σ = 263641784. Its totient is φ = 263641782.

The previous prime is 263641759. The next prime is 263641799. The reversal of 263641783 is 387146362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 263641783 - 2¹⁷ = 263510711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263641733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131820891 + 131820892.

It is an arithmetic number, because the mean of its divisors is an integer number (131820892).

Almost surely, 2^263641783 is an apocalyptic number.

263641783 is a deficient number, since it is larger than the sum of its proper divisors (1).

263641783 is an equidigital number, since it uses as much as digits as its factorization.

263641783 is an evil number, because the sum of its binary digits is even.

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

The square root of 263641783 is about 16237.0497012234. The cubic root of 263641783 is about 641.2165848375.

The spelling of 263641783 in words is "two hundred sixty-three million, six hundred forty-one thousand, seven hundred eighty-three".