87987842 has 4 divisors (see below), whose sum is σ = 131981766. Its totient is φ = 43993920.

The previous prime is 87987829. The next prime is 87987859. The reversal of 87987842 is 24878978.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 87965641 + 22201 = 9379^2 + 149^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21996959 + ... + 21996962.

Almost surely, 2^87987842 is an apocalyptic number.

87987842 is a deficient number, since it is larger than the sum of its proper divisors (43993924).

87987842 is a wasteful number, since it uses less digits than its factorization.

87987842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43993923.

The product of its digits is 1806336, while the sum is 53.

The square root of 87987842 is about 9380.1834736854. The cubic root of 87987842 is about 444.7755329659.

The spelling of 87987842 in words is "eighty-seven million, nine hundred eighty-seven thousand, eight hundred forty-two".