87398219 has 4 divisors (see below), whose sum is σ = 89047296. Its totient is φ = 85749144.

The previous prime is 87398197. The next prime is 87398243. The reversal of 87398219 is 91289378.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87398219 - 2⁸ = 87397963 is a prime.

It is a super-2 number, since 2×87398219² = 15276897368743922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87391219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824459 + ... + 824564.

It is an arithmetic number, because the mean of its divisors is an integer number (22261824).

Almost surely, 2^87398219 is an apocalyptic number.

87398219 is a deficient number, since it is larger than the sum of its proper divisors (1649077).

87398219 is a wasteful number, since it uses less digits than its factorization.

87398219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649076.

The product of its digits is 217728, while the sum is 47.

The square root of 87398219 is about 9348.7014606308. The cubic root of 87398219 is about 443.7797974040.

The spelling of 87398219 in words is "eighty-seven million, three hundred ninety-eight thousand, two hundred nineteen".