263428849 has 2 divisors, whose sum is σ = 263428850. Its totient is φ = 263428848.

The previous prime is 263428831. The next prime is 263428853. The reversal of 263428849 is 948824362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254083600 + 9345249 = 15940^2 + 3057^2 .

It is a cyclic number.

It is not a de Polignac number, because 263428849 - 2¹³ = 263420657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 263428799 and 263428808.

It is not a weakly prime, because it can be changed into another prime (263428829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131714424 + 131714425.

It is an arithmetic number, because the mean of its divisors is an integer number (131714425).

Almost surely, 2^263428849 is an apocalyptic number.

It is an amenable number.

263428849 is a deficient number, since it is larger than the sum of its proper divisors (1).

263428849 is an equidigital number, since it uses as much as digits as its factorization.

263428849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 46.

The square root of 263428849 is about 16230.4913357544. The cubic root of 263428849 is about 641.0439091386.

The spelling of 263428849 in words is "two hundred sixty-three million, four hundred twenty-eight thousand, eight hundred forty-nine".