263320249 has 2 divisors, whose sum is σ = 263320250. Its totient is φ = 263320248.

The previous prime is 263320237. The next prime is 263320283. The reversal of 263320249 is 942023362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227798649 + 35521600 = 15093^2 + 5960^2 .

It is a cyclic number.

It is not a de Polignac number, because 263320249 - 2⁵ = 263320217 is a prime.

It is a super-3 number, since 3×263320249³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 263320249.

It is not a weakly prime, because it can be changed into another prime (263320219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131660124 + 131660125.

It is an arithmetic number, because the mean of its divisors is an integer number (131660125).

Almost surely, 2^263320249 is an apocalyptic number.

It is an amenable number.

263320249 is a deficient number, since it is larger than the sum of its proper divisors (1).

263320249 is an equidigital number, since it uses as much as digits as its factorization.

263320249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 263320249 is about 16227.1454359662. The cubic root of 263320249 is about 640.9558057314.

The spelling of 263320249 in words is "two hundred sixty-three million, three hundred twenty thousand, two hundred forty-nine".