820127263 has 2 divisors, whose sum is σ = 820127264. Its totient is φ = 820127262.

The previous prime is 820127207. The next prime is 820127281. The reversal of 820127263 is 362721028.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 820127263 - 2¹³ = 820119071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (820127293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410063631 + 410063632.

It is an arithmetic number, because the mean of its divisors is an integer number (410063632).

Almost surely, 2^820127263 is an apocalyptic number.

820127263 is a deficient number, since it is larger than the sum of its proper divisors (1).

820127263 is an equidigital number, since it uses as much as digits as its factorization.

820127263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 820127263 is about 28637.8641487105. The cubic root of 820127263 is about 936.0385813199.

The spelling of 820127263 in words is "eight hundred twenty million, one hundred twenty-seven thousand, two hundred sixty-three".