87178291219 has 2 divisors, whose sum is σ = 87178291220. Its totient is φ = 87178291218.

The previous prime is 87178291199. The next prime is 87178291241. The reversal of 87178291219 is 91219287178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87178291219 - 2¹⁵ = 87178258451 is a prime.

It is a super-2 number, since 2×87178291219² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87178291219.

It is not a weakly prime, because it can be changed into another prime (87178291279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43589145609 + 43589145610.

It is an arithmetic number, because the mean of its divisors is an integer number (43589145610).

Almost surely, 2^87178291219 is an apocalyptic number.

87178291219 is a deficient number, since it is larger than the sum of its proper divisors (1).

87178291219 is an equidigital number, since it uses as much as digits as its factorization.

87178291219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 55.

The spelling of 87178291219 in words is "eighty-seven billion, one hundred seventy-eight million, two hundred ninety-one thousand, two hundred nineteen".