263630429 has 2 divisors, whose sum is σ = 263630430. Its totient is φ = 263630428.

The previous prime is 263630399. The next prime is 263630431. The reversal of 263630429 is 924036362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193154404 + 70476025 = 13898^2 + 8395^2 .

It is a cyclic number.

It is not a de Polignac number, because 263630429 - 2¹² = 263626333 is a prime.

It is a Sophie Germain prime.

Together with 263630431, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263630449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131815214 + 131815215.

It is an arithmetic number, because the mean of its divisors is an integer number (131815215).

Almost surely, 2^263630429 is an apocalyptic number.

It is an amenable number.

263630429 is a deficient number, since it is larger than the sum of its proper divisors (1).

263630429 is an equidigital number, since it uses as much as digits as its factorization.

263630429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 263630429 is about 16236.7000649763. The cubic root of 263630429 is about 641.2073798251.

The spelling of 263630429 in words is "two hundred sixty-three million, six hundred thirty thousand, four hundred twenty-nine".