263899049 has 2 divisors, whose sum is σ = 263899050. Its totient is φ = 263899048.

The previous prime is 263899021. The next prime is 263899061. The reversal of 263899049 is 940998362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198612649 + 65286400 = 14093^2 + 8080^2 .

It is a cyclic number.

It is not a de Polignac number, because 263899049 - 2²⁰ = 262850473 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 263898988 and 263899006.

It is not a weakly prime, because it can be changed into another prime (263899099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131949524 + 131949525.

It is an arithmetic number, because the mean of its divisors is an integer number (131949525).

Almost surely, 2^263899049 is an apocalyptic number.

It is an amenable number.

263899049 is a deficient number, since it is larger than the sum of its proper divisors (1).

263899049 is an equidigital number, since it uses as much as digits as its factorization.

263899049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 50.

The square root of 263899049 is about 16244.9699599599. The cubic root of 263899049 is about 641.4250869385.

The spelling of 263899049 in words is "two hundred sixty-three million, eight hundred ninety-nine thousand, forty-nine".