263955623 has 2 divisors, whose sum is σ = 263955624. Its totient is φ = 263955622.

The previous prime is 263955563. The next prime is 263955631. The reversal of 263955623 is 326559362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 263955623 - 2²⁶ = 196846759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263955673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131977811 + 131977812.

It is an arithmetic number, because the mean of its divisors is an integer number (131977812).

Almost surely, 2^263955623 is an apocalyptic number.

263955623 is a deficient number, since it is larger than the sum of its proper divisors (1).

263955623 is an equidigital number, since it uses as much as digits as its factorization.

263955623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 41.

The square root of 263955623 is about 16246.7111441054. The cubic root of 263955623 is about 641.4709193509.

The spelling of 263955623 in words is "two hundred sixty-three million, nine hundred fifty-five thousand, six hundred twenty-three".