87577647 has 4 divisors (see below), whose sum is σ = 116770200. Its totient is φ = 58385096.

The previous prime is 87577619. The next prime is 87577649. The reversal of 87577647 is 74677578.

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 87577647 - 2⁷ = 87577519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87577647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87577649) 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, 14596272 + ... + 14596277.

It is an arithmetic number, because the mean of its divisors is an integer number (29192550).

Almost surely, 2^87577647 is an apocalyptic number.

87577647 is a deficient number, since it is larger than the sum of its proper divisors (29192553).

87577647 is a wasteful number, since it uses less digits than its factorization.

87577647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29192552.

The product of its digits is 2304960, while the sum is 51.

The square root of 87577647 is about 9358.2929533115. The cubic root of 87577647 is about 444.0832822024.

The spelling of 87577647 in words is "eighty-seven million, five hundred seventy-seven thousand, six hundred forty-seven".