87559978 has 8 divisors (see below), whose sum is σ = 143280000. Its totient is φ = 39799980.

The previous prime is 87559963. The next prime is 87559993. The reversal of 87559978 is 87995578.

It is an interprime number because it is at equal distance from previous prime (87559963) and next prime (87559993).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1989978 + ... + 1990021.

It is an arithmetic number, because the mean of its divisors is an integer number (17910000).

Almost surely, 2^87559978 is an apocalyptic number.

87559978 is a deficient number, since it is larger than the sum of its proper divisors (55720022).

87559978 is a wasteful number, since it uses less digits than its factorization.

87559978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3980012.

The product of its digits is 6350400, while the sum is 58.

The square root of 87559978 is about 9357.3488766851. The cubic root of 87559978 is about 444.0534152386.

Subtracting 87559978 from its reverse (87995578), we obtain a square (435600 = 660²).

It can be divided in two parts, 87 and 559978, that added together give a palindrome (560065).

The spelling of 87559978 in words is "eighty-seven million, five hundred fifty-nine thousand, nine hundred seventy-eight".