864547087 has 4 divisors (see below), whose sum is σ = 915402816. Its totient is φ = 813691360.

The previous prime is 864547081. The next prime is 864547097. The reversal of 864547087 is 780745468.

It is a happy number.

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 864547087 - 2⁷ = 864546959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 864547087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864547081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25427839 + ... + 25427872.

It is an arithmetic number, because the mean of its divisors is an integer number (228850704).

Almost surely, 2^864547087 is an apocalyptic number.

864547087 is a deficient number, since it is larger than the sum of its proper divisors (50855729).

864547087 is a wasteful number, since it uses less digits than its factorization.

864547087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50855728.

The product of its (nonzero) digits is 1505280, while the sum is 49.

The square root of 864547087 is about 29403.1815795502. The cubic root of 864547087 is about 952.6416180427.

The spelling of 864547087 in words is "eight hundred sixty-four million, five hundred forty-seven thousand, eighty-seven".