87018419 has 4 divisors (see below), whose sum is σ = 87059040. Its totient is φ = 86977800.

The previous prime is 87018389. The next prime is 87018433. The reversal of 87018419 is 91481078.

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 87018419 - 2¹⁶ = 86952883 is a prime.

It is a super-2 number, since 2×87018419² = 15144410490519122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87018319) 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 in 3 ways as a sum of consecutive naturals, for example, 16907 + ... + 21444.

It is an arithmetic number, because the mean of its divisors is an integer number (21764760).

Almost surely, 2^87018419 is an apocalyptic number.

87018419 is a deficient number, since it is larger than the sum of its proper divisors (40621).

87018419 is a wasteful number, since it uses less digits than its factorization.

87018419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40620.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 87018419 is about 9328.3663628740. The cubic root of 87018419 is about 443.1360302564.

The spelling of 87018419 in words is "eighty-seven million, eighteen thousand, four hundred nineteen".