263989382473 has 2 divisors, whose sum is σ = 263989382474. Its totient is φ = 263989382472.

The previous prime is 263989382443. The next prime is 263989382509. The reversal of 263989382473 is 374283989362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155592380304 + 108397002169 = 394452^2 + 329237^2 .

It is a cyclic number.

It is not a de Polignac number, because 263989382473 - 2²¹ = 263987285321 is a prime.

It is not a weakly prime, because it can be changed into another prime (263989382413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131994691236 + 131994691237.

It is an arithmetic number, because the mean of its divisors is an integer number (131994691237).

Almost surely, 2^263989382473 is an apocalyptic number.

It is an amenable number.

263989382473 is a deficient number, since it is larger than the sum of its proper divisors (1).

263989382473 is an equidigital number, since it uses as much as digits as its factorization.

263989382473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94058496, while the sum is 64.

The spelling of 263989382473 in words is "two hundred sixty-three billion, nine hundred eighty-nine million, three hundred eighty-two thousand, four hundred seventy-three".