263619049 has 2 divisors, whose sum is σ = 263619050. Its totient is φ = 263619048.

The previous prime is 263619047. The next prime is 263619089. The reversal of 263619049 is 940916362.

It is an a-pointer prime, because the next prime (263619089) can be obtained adding 263619049 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144961600 + 118657449 = 12040^2 + 10893^2 .

It is a cyclic number.

It is not a de Polignac number, because 263619049 - 2¹ = 263619047 is a prime.

Together with 263619047, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (263619047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131809524 + 131809525.

It is an arithmetic number, because the mean of its divisors is an integer number (131809525).

Almost surely, 2^263619049 is an apocalyptic number.

It is an amenable number.

263619049 is a deficient number, since it is larger than the sum of its proper divisors (1).

263619049 is an equidigital number, since it uses as much as digits as its factorization.

263619049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 263619049 is about 16236.3496205274. The cubic root of 263619049 is about 641.1981534686.

The spelling of 263619049 in words is "two hundred sixty-three million, six hundred nineteen thousand, forty-nine".