87440091787 has 8 divisors (see below), whose sum is σ = 92586913056. Its totient is φ = 82293635712.

The previous prime is 87440091779. The next prime is 87440091839. The reversal of 87440091787 is 78719004478.

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

It is a cyclic number.

It is not a de Polignac number, because 87440091787 - 2³ = 87440091779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87440091757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517833 + ... + 665605.

It is an arithmetic number, because the mean of its divisors is an integer number (11573364132).

Almost surely, 2^87440091787 is an apocalyptic number.

87440091787 is a deficient number, since it is larger than the sum of its proper divisors (5146821269).

87440091787 is a wasteful number, since it uses less digits than its factorization.

87440091787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182597.

The product of its (nonzero) digits is 3161088, while the sum is 55.

The spelling of 87440091787 in words is "eighty-seven billion, four hundred forty million, ninety-one thousand, seven hundred eighty-seven".