263849623 has 2 divisors, whose sum is σ = 263849624. Its totient is φ = 263849622.

The previous prime is 263849617. The next prime is 263849633. The reversal of 263849623 is 326948362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263849623 - 2⁹ = 263849111 is a prime.

It is a super-3 number, since 3×263849623³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 263849623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263849633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131924811 + 131924812.

It is an arithmetic number, because the mean of its divisors is an integer number (131924812).

Almost surely, 2^263849623 is an apocalyptic number.

263849623 is a deficient number, since it is larger than the sum of its proper divisors (1).

263849623 is an equidigital number, since it uses as much as digits as its factorization.

263849623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 43.

The square root of 263849623 is about 16243.4486178274. The cubic root of 263849623 is about 641.3850399889.

The spelling of 263849623 in words is "two hundred sixty-three million, eight hundred forty-nine thousand, six hundred twenty-three".