263913893 has 2 divisors, whose sum is σ = 263913894. Its totient is φ = 263913892.

The previous prime is 263913869. The next prime is 263913901. The reversal of 263913893 is 398319362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 260080129 + 3833764 = 16127^2 + 1958^2 .

It is a cyclic number.

It is not a de Polignac number, because 263913893 - 2⁶ = 263913829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263913823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131956946 + 131956947.

It is an arithmetic number, because the mean of its divisors is an integer number (131956947).

Almost surely, 2^263913893 is an apocalyptic number.

It is an amenable number.

263913893 is a deficient number, since it is larger than the sum of its proper divisors (1).

263913893 is an equidigital number, since it uses as much as digits as its factorization.

263913893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 44.

The square root of 263913893 is about 16245.4268334199. The cubic root of 263913893 is about 641.4371131730.

The spelling of 263913893 in words is "two hundred sixty-three million, nine hundred thirteen thousand, eight hundred ninety-three".