87577771 has 4 divisors (see below), whose sum is σ = 89062200. Its totient is φ = 86093344.

The previous prime is 87577769. The next prime is 87577811. The reversal of 87577771 is 17777578.

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 87577771 - 2¹ = 87577769 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 not an unprimeable number, because it can be changed into a prime (87577751) 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, 742126 + ... + 742243.

It is an arithmetic number, because the mean of its divisors is an integer number (22265550).

Almost surely, 2^87577771 is an apocalyptic number.

87577771 is a deficient number, since it is larger than the sum of its proper divisors (1484429).

87577771 is a wasteful number, since it uses less digits than its factorization.

87577771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484428.

The product of its digits is 672280, while the sum is 49.

The square root of 87577771 is about 9358.2995784491. The cubic root of 87577771 is about 444.0834917928.

The spelling of 87577771 in words is "eighty-seven million, five hundred seventy-seven thousand, seven hundred seventy-one".