5263423981 has 2 divisors, whose sum is σ = 5263423982. Its totient is φ = 5263423980.

The previous prime is 5263423969. The next prime is 5263423999. The reversal of 5263423981 is 1893243625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2885301225 + 2378122756 = 53715^2 + 48766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5263423981 is a prime.

It is a super-2 number, since 2×5263423981² = 55407264007531776722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5263423931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2631711990 + 2631711991.

It is an arithmetic number, because the mean of its divisors is an integer number (2631711991).

Almost surely, 2^5263423981 is an apocalyptic number.

It is an amenable number.

5263423981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5263423981 is an equidigital number, since it uses as much as digits as its factorization.

5263423981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 43.

The square root of 5263423981 is about 72549.4588608351. The cubic root of 5263423981 is about 1739.4933986704.

The spelling of 5263423981 in words is "five billion, two hundred sixty-three million, four hundred twenty-three thousand, nine hundred eighty-one".