87788219 has 2 divisors, whose sum is σ = 87788220. Its totient is φ = 87788218.

The previous prime is 87788203. The next prime is 87788237. The reversal of 87788219 is 91288778.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87788219 - 2⁴ = 87788203 is a prime.

It is a super-2 number, since 2×87788219² = 15413542790383922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87788719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43894109 + 43894110.

It is an arithmetic number, because the mean of its divisors is an integer number (43894110).

Almost surely, 2^87788219 is an apocalyptic number.

87788219 is a deficient number, since it is larger than the sum of its proper divisors (1).

87788219 is an equidigital number, since it uses as much as digits as its factorization.

87788219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 50.

The square root of 87788219 is about 9369.5367548241. The cubic root of 87788219 is about 444.4389157900.

The spelling of 87788219 in words is "eighty-seven million, seven hundred eighty-eight thousand, two hundred nineteen".