87780223 has 2 divisors, whose sum is σ = 87780224. Its totient is φ = 87780222.

The previous prime is 87780193. The next prime is 87780263. The reversal of 87780223 is 32208778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87780223 - 2¹³ = 87772031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87780263) 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, 43890111 + 43890112.

It is an arithmetic number, because the mean of its divisors is an integer number (43890112).

Almost surely, 2^87780223 is an apocalyptic number.

87780223 is a deficient number, since it is larger than the sum of its proper divisors (1).

87780223 is an equidigital number, since it uses as much as digits as its factorization.

87780223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 87780223 is about 9369.1100431151. The cubic root of 87780223 is about 444.4254217946.

The spelling of 87780223 in words is "eighty-seven million, seven hundred eighty thousand, two hundred twenty-three".