87133990 has 8 divisors (see below), whose sum is σ = 156841200. Its totient is φ = 34853592.

The previous prime is 87133939. The next prime is 87134011. The reversal of 87133990 is 9933178.

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

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 4356690 + ... + 4356709.

It is an arithmetic number, because the mean of its divisors is an integer number (19605150).

Almost surely, 2^87133990 is an apocalyptic number.

87133990 is a deficient number, since it is larger than the sum of its proper divisors (69707210).

87133990 is a wasteful number, since it uses less digits than its factorization.

87133990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8713406.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 87133990 is about 9334.5589076292. The cubic root of 87133990 is about 443.3321229105.

The spelling of 87133990 in words is "eighty-seven million, one hundred thirty-three thousand, nine hundred ninety".