263698453 has 2 divisors, whose sum is σ = 263698454. Its totient is φ = 263698452.

The previous prime is 263698451. The next prime is 263698469. The reversal of 263698453 is 354896362.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259789924 + 3908529 = 16118^2 + 1977^2 .

It is a cyclic number.

It is not a de Polignac number, because 263698453 - 2¹ = 263698451 is a prime.

It is a super-2 number, since 2×263698453² = 139073748229186418, which contains 22 as substring.

Together with 263698451, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263698451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131849226 + 131849227.

It is an arithmetic number, because the mean of its divisors is an integer number (131849227).

Almost surely, 2^263698453 is an apocalyptic number.

It is an amenable number.

263698453 is a deficient number, since it is larger than the sum of its proper divisors (1).

263698453 is an equidigital number, since it uses as much as digits as its factorization.

263698453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 46.

The square root of 263698453 is about 16238.7946904935. The cubic root of 263698453 is about 641.2625248755.

The spelling of 263698453 in words is "two hundred sixty-three million, six hundred ninety-eight thousand, four hundred fifty-three".