87109844 has 6 divisors (see below), whose sum is σ = 152442234. Its totient is φ = 43554920.

The previous prime is 87109843. The next prime is 87109861. The reversal of 87109844 is 44890178.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 72760900 + 14348944 = 8530^2 + 3788^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87109843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10888727 + ... + 10888734.

It is an arithmetic number, because the mean of its divisors is an integer number (25407039).

Almost surely, 2^87109844 is an apocalyptic number.

It is an amenable number.

87109844 is a deficient number, since it is larger than the sum of its proper divisors (65332390).

87109844 is a wasteful number, since it uses less digits than its factorization.

87109844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21777465 (or 21777463 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 87109844 is about 9333.2654521341. The cubic root of 87109844 is about 443.2911680302.

The spelling of 87109844 in words is "eighty-seven million, one hundred nine thousand, eight hundred forty-four".