263994889001 has 2 divisors, whose sum is σ = 263994889002. Its totient is φ = 263994889000.

The previous prime is 263994888959. The next prime is 263994889013. The reversal of 263994889001 is 100988499362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256363992976 + 7630896025 = 506324^2 + 87355^2 .

It is a cyclic number.

It is not a de Polignac number, because 263994889001 - 2¹⁰ = 263994887977 is a prime.

It is not a weakly prime, because it can be changed into another prime (263994889061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131997444500 + 131997444501.

It is an arithmetic number, because the mean of its divisors is an integer number (131997444501).

Almost surely, 2^263994889001 is an apocalyptic number.

It is an amenable number.

263994889001 is a deficient number, since it is larger than the sum of its proper divisors (1).

263994889001 is an equidigital number, since it uses as much as digits as its factorization.

263994889001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6718464, while the sum is 59.

The spelling of 263994889001 in words is "two hundred sixty-three billion, nine hundred ninety-four million, eight hundred eighty-nine thousand, one".