87043555 has 4 divisors (see below), whose sum is σ = 104452272. Its totient is φ = 69634840.

The previous prime is 87043507. The next prime is 87043559. The reversal of 87043555 is 55534078.

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

It is not a de Polignac number, because 87043555 - 2¹⁵ = 87010787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87043559) 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, 8704351 + ... + 8704360.

It is an arithmetic number, because the mean of its divisors is an integer number (26113068).

Almost surely, 2^87043555 is an apocalyptic number.

87043555 is a deficient number, since it is larger than the sum of its proper divisors (17408717).

87043555 is a wasteful number, since it uses less digits than its factorization.

87043555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17408716.

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 87043555 is about 9329.7135540165. The cubic root of 87043555 is about 443.1786940014.

The spelling of 87043555 in words is "eighty-seven million, forty-three thousand, five hundred fifty-five".