263678873 has 2 divisors, whose sum is σ = 263678874. Its totient is φ = 263678872.

The previous prime is 263678861. The next prime is 263678897. The reversal of 263678873 is 378876362.

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., 172055689 + 91623184 = 13117^2 + 9572^2 .

It is a cyclic number.

It is not a de Polignac number, because 263678873 - 2⁸ = 263678617 is a prime.

It is not a weakly prime, because it can be changed into another prime (263678813) 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 as a sum of consecutive naturals, namely, 131839436 + 131839437.

It is an arithmetic number, because the mean of its divisors is an integer number (131839437).

Almost surely, 2^263678873 is an apocalyptic number.

It is an amenable number.

263678873 is a deficient number, since it is larger than the sum of its proper divisors (1).

263678873 is an equidigital number, since it uses as much as digits as its factorization.

263678873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 50.

The square root of 263678873 is about 16238.1918020450. The cubic root of 263678873 is about 641.2466529191.

The spelling of 263678873 in words is "two hundred sixty-three million, six hundred seventy-eight thousand, eight hundred seventy-three".