263445361 has 3 divisors (see below), whose sum is σ = 263461593. Its totient is φ = 263429130.

The previous prime is 263445341. The next prime is 263445373. The reversal of 263445361 is 163544362.

The square root of 263445361 is 16231.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 263445361 - 2⁹ = 263444849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263445341) 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 2 ways as a sum of consecutive naturals, for example, 8116 + ... + 24346.

It is an arithmetic number, because the mean of its divisors is an integer number (87820531).

Almost surely, 2^263445361 is an apocalyptic number.

263445361 is the 16231-st square number.

263445361 is the 8116-th centered octagonal number.

It is an amenable number.

263445361 is a deficient number, since it is larger than the sum of its proper divisors (16232).

263445361 is an frugal number, since it uses more digits than its factorization.

263445361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32462 (or 16231 counting only the distinct ones).

The product of its digits is 51840, while the sum is 34.

The cubic root of 263445361 is about 641.0573026298.

Subtracting from 263445361 its reverse (163544362), we obtain a palindrome (99900999).

The spelling of 263445361 in words is "two hundred sixty-three million, four hundred forty-five thousand, three hundred sixty-one".