263001643 has 2 divisors, whose sum is σ = 263001644. Its totient is φ = 263001642.

The previous prime is 263001601. The next prime is 263001649. The reversal of 263001643 is 346100362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 263001643 - 2¹⁷ = 262870571 is a prime.

It is not a weakly prime, because it can be changed into another prime (263001649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131500821 + 131500822.

It is an arithmetic number, because the mean of its divisors is an integer number (131500822).

Almost surely, 2^263001643 is an apocalyptic number.

263001643 is a deficient number, since it is larger than the sum of its proper divisors (1).

263001643 is an equidigital number, since it uses as much as digits as its factorization.

263001643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 263001643 is about 16217.3253960078. The cubic root of 263001643 is about 640.6971918898.

The spelling of 263001643 in words is "two hundred sixty-three million, one thousand, six hundred forty-three".