87550691 has 4 divisors (see below), whose sum is σ = 87625272. Its totient is φ = 87476112.

The previous prime is 87550669. The next prime is 87550699. The reversal of 87550691 is 19605578.

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

It is a cyclic number.

It is not a de Polignac number, because 87550691 - 2¹⁸ = 87288547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87550699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35501 + ... + 37886.

It is an arithmetic number, because the mean of its divisors is an integer number (21906318).

Almost surely, 2^87550691 is an apocalyptic number.

87550691 is a deficient number, since it is larger than the sum of its proper divisors (74581).

87550691 is a wasteful number, since it uses less digits than its factorization.

87550691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74580.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 87550691 is about 9356.8526225435. The cubic root of 87550691 is about 444.0377152579.

The spelling of 87550691 in words is "eighty-seven million, five hundred fifty thousand, six hundred ninety-one".