263261849 has 2 divisors, whose sum is σ = 263261850. Its totient is φ = 263261848.

The previous prime is 263261809. The next prime is 263261851. The reversal of 263261849 is 948162362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202920025 + 60341824 = 14245^2 + 7768^2 .

It is a cyclic number.

It is not a de Polignac number, because 263261849 - 2²⁴ = 246484633 is a prime.

It is a super-2 number, since 2×263261849² = 138613602277797602, which contains 22 as substring.

Together with 263261851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (263261809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131630924 + 131630925.

It is an arithmetic number, because the mean of its divisors is an integer number (131630925).

Almost surely, 2^263261849 is an apocalyptic number.

It is an amenable number.

263261849 is a deficient number, since it is larger than the sum of its proper divisors (1).

263261849 is an equidigital number, since it uses as much as digits as its factorization.

263261849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 41.

The square root of 263261849 is about 16225.3458822917. The cubic root of 263261849 is about 640.9084178241.

The spelling of 263261849 in words is "two hundred sixty-three million, two hundred sixty-one thousand, eight hundred forty-nine".