87013219 has 2 divisors, whose sum is σ = 87013220. Its totient is φ = 87013218.

The previous prime is 87013189. The next prime is 87013229. The reversal of 87013219 is 91231078.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87013219 - 2⁹ = 87012707 is a prime.

It is a super-2 number, since 2×87013219² = 15142600561483922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87013229) 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, 43506609 + 43506610.

It is an arithmetic number, because the mean of its divisors is an integer number (43506610).

Almost surely, 2^87013219 is an apocalyptic number.

87013219 is a deficient number, since it is larger than the sum of its proper divisors (1).

87013219 is an equidigital number, since it uses as much as digits as its factorization.

87013219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 87013219 is about 9328.0876389537. The cubic root of 87013219 is about 443.1272031855.

The spelling of 87013219 in words is "eighty-seven million, thirteen thousand, two hundred nineteen".