263009 has 2 divisors, whose sum is σ = 263010.
Its totient is φ = 263008.
The previous prime is 262981. The next prime is 263023. The reversal of 263009 is 900362.
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 253009 + 10000 = 503^2 + 100^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-263009 is a prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (263089) by changing a digit.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131504 + 131505.
It is an arithmetic number, because the mean of its divisors is an integer number (131505).
2263009 is an apocalyptic number.
It is an amenable number.
263009 is a deficient number, since it is larger than the sum of its proper divisors (1).
263009 is an equidigital number, since it uses as much as digits as its factorization.
263009 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 324, while the sum is 20.
The square root of 263009 is about 512.8440308710.
The cubic root of 263009 is about 64.0703165953.
The spelling of 263009 in words is "two hundred sixty-three thousand, nine".