87278519 has 8 divisors (see below), whose sum is σ = 89443200. Its totient is φ = 85120056.

The previous prime is 87278501. The next prime is 87278539. The reversal of 87278519 is 91587278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87278519 - 2⁸ = 87278263 is a prime.

It is a super-2 number, since 2×87278519² = 15235079757666722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87278539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40532 + ... + 42630.

It is an arithmetic number, because the mean of its divisors is an integer number (11180400).

Almost surely, 2^87278519 is an apocalyptic number.

87278519 is a deficient number, since it is larger than the sum of its proper divisors (2164681).

87278519 is a wasteful number, since it uses less digits than its factorization.

87278519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109.

The product of its digits is 282240, while the sum is 47.

The square root of 87278519 is about 9342.2973084783. The cubic root of 87278519 is about 443.5771055873.

The spelling of 87278519 in words is "eighty-seven million, two hundred seventy-eight thousand, five hundred nineteen".