87191386 has 8 divisors (see below), whose sum is σ = 131100480. Its totient is φ = 43491228.

The previous prime is 87191383. The next prime is 87191473. The reversal of 87191386 is 68319178.

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 (87191383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51186 + ... + 52861.

It is an arithmetic number, because the mean of its divisors is an integer number (16387560).

Almost surely, 2^87191386 is an apocalyptic number.

87191386 is a deficient number, since it is larger than the sum of its proper divisors (43909094).

87191386 is a wasteful number, since it uses less digits than its factorization.

87191386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104468.

The product of its digits is 72576, while the sum is 43.

The square root of 87191386 is about 9337.6327835271. The cubic root of 87191386 is about 443.4294439273.

The spelling of 87191386 in words is "eighty-seven million, one hundred ninety-one thousand, three hundred eighty-six".