263843123497 has 4 divisors (see below), whose sum is σ = 266563155796. Its totient is φ = 261123091200.

The previous prime is 263843123483. The next prime is 263843123561. The reversal of 263843123497 is 794321348362.

263843123497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44014361616 + 219828761881 = 209796^2 + 468859^2 .

It is a cyclic number.

It is not a de Polignac number, because 263843123497 - 2²⁷ = 263708905769 is a prime.

It is a super-2 number, since 2×263843123497² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263843121497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1360016004 + ... + 1360016197.

It is an arithmetic number, because the mean of its divisors is an integer number (66640788949).

Almost surely, 2^263843123497 is an apocalyptic number.

It is an amenable number.

263843123497 is a deficient number, since it is larger than the sum of its proper divisors (2720032299).

263843123497 is an equidigital number, since it uses as much as digits as its factorization.

263843123497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720032298.

The product of its digits is 5225472, while the sum is 52.

The spelling of 263843123497 in words is "two hundred sixty-three billion, eight hundred forty-three million, one hundred twenty-three thousand, four hundred ninety-seven".