87788047 has 4 divisors (see below), whose sum is σ = 89276040. Its totient is φ = 86300056.

The previous prime is 87787991. The next prime is 87788083. The reversal of 87788047 is 74088778.

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 87788047 - 2⁷ = 87787919 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87788747) 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, 743908 + ... + 744025.

It is an arithmetic number, because the mean of its divisors is an integer number (22319010).

Almost surely, 2^87788047 is an apocalyptic number.

87788047 is a deficient number, since it is larger than the sum of its proper divisors (1487993).

87788047 is a wasteful number, since it uses less digits than its factorization.

87788047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487992.

The product of its (nonzero) digits is 702464, while the sum is 49.

The square root of 87788047 is about 9369.5275761374. The cubic root of 87788047 is about 444.4386255326.

The spelling of 87788047 in words is "eighty-seven million, seven hundred eighty-eight thousand, forty-seven".