263553623 has 2 divisors, whose sum is σ = 263553624. Its totient is φ = 263553622.

The previous prime is 263553551. The next prime is 263553637. The reversal of 263553623 is 326355362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 263553623 - 2¹² = 263549527 is a prime.

It is a super-2 number, since 2×263553623² = 138921024392852258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263559623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131776811 + 131776812.

It is an arithmetic number, because the mean of its divisors is an integer number (131776812).

Almost surely, 2^263553623 is an apocalyptic number.

263553623 is a deficient number, since it is larger than the sum of its proper divisors (1).

263553623 is an equidigital number, since it uses as much as digits as its factorization.

263553623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 35.

The square root of 263553623 is about 16234.3346953301. The cubic root of 263553623 is about 641.1451040632.

The spelling of 263553623 in words is "two hundred sixty-three million, five hundred fifty-three thousand, six hundred twenty-three".