263679887 has 2 divisors, whose sum is σ = 263679888. Its totient is φ = 263679886.

The previous prime is 263679863. The next prime is 263679931. The reversal of 263679887 is 788976362.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263679887 - 2¹⁴ = 263663503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263679287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131839943 + 131839944.

It is an arithmetic number, because the mean of its divisors is an integer number (131839944).

Almost surely, 2^263679887 is an apocalyptic number.

263679887 is a deficient number, since it is larger than the sum of its proper divisors (1).

263679887 is an equidigital number, since it uses as much as digits as its factorization.

263679887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 56.

The square root of 263679887 is about 16238.2230247032. The cubic root of 263679887 is about 641.2474749079.

The spelling of 263679887 in words is "two hundred sixty-three million, six hundred seventy-nine thousand, eight hundred eighty-seven".