87780263 has 2 divisors, whose sum is σ = 87780264. Its totient is φ = 87780262.

The previous prime is 87780223. The next prime is 87780269. The reversal of 87780263 is 36208778.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87780263 - 2¹⁰ = 87779239 is a prime.

It is equal to p_5095778 and since 87780263 and 5095778 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87780263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87780269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43890131 + 43890132.

It is an arithmetic number, because the mean of its divisors is an integer number (43890132).

Almost surely, 2^87780263 is an apocalyptic number.

87780263 is a deficient number, since it is larger than the sum of its proper divisors (1).

87780263 is an equidigital number, since it uses as much as digits as its factorization.

87780263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 87780263 is about 9369.1121777893. The cubic root of 87780263 is about 444.4254893004.

The spelling of 87780263 in words is "eighty-seven million, seven hundred eighty thousand, two hundred sixty-three".