87187930 has 8 divisors (see below), whose sum is σ = 156938292. Its totient is φ = 34875168.

The previous prime is 87187921. The next prime is 87187937. The reversal of 87187930 is 3978178.

It can be written as a sum of positive squares in 2 ways, for example, as 79619929 + 7568001 = 8923^2 + 2751^2 .

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

It is not an unprimeable number, because it can be changed into a prime (87187937) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 4359387 + ... + 4359406.

Almost surely, 2^87187930 is an apocalyptic number.

87187930 is a deficient number, since it is larger than the sum of its proper divisors (69750362).

87187930 is a wasteful number, since it uses less digits than its factorization.

87187930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8718800.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 87187930 is about 9337.4477240839. The cubic root of 87187930 is about 443.4235851207.

The spelling of 87187930 in words is "eighty-seven million, one hundred eighty-seven thousand, nine hundred thirty".