263984313613 has 2 divisors, whose sum is σ = 263984313614. Its totient is φ = 263984313612.

The previous prime is 263984313577. The next prime is 263984313641. The reversal of 263984313613 is 316313489362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205297797604 + 58686516009 = 453098^2 + 242253^2 .

It is a cyclic number.

It is not a de Polignac number, because 263984313613 - 2³³ = 255394379021 is a prime.

It is a super-2 number, since 2×263984313613² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263984313683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131992156806 + 131992156807.

It is an arithmetic number, because the mean of its divisors is an integer number (131992156807).

Almost surely, 2^263984313613 is an apocalyptic number.

It is an amenable number.

263984313613 is a deficient number, since it is larger than the sum of its proper divisors (1).

263984313613 is an equidigital number, since it uses as much as digits as its factorization.

263984313613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 49.

The spelling of 263984313613 in words is "two hundred sixty-three billion, nine hundred eighty-four million, three hundred thirteen thousand, six hundred thirteen".