864718087 has 4 divisors (see below), whose sum is σ = 865213120. Its totient is φ = 864223056.

The previous prime is 864718081. The next prime is 864718093. The reversal of 864718087 is 780817468.

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

It is an interprime number because it is at equal distance from previous prime (864718081) and next prime (864718093).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864718087 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 864718087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864718081) 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, 244887 + ... + 248392.

It is an arithmetic number, because the mean of its divisors is an integer number (216303280).

Almost surely, 2^864718087 is an apocalyptic number.

864718087 is a deficient number, since it is larger than the sum of its proper divisors (495033).

864718087 is a wasteful number, since it uses less digits than its factorization.

864718087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495032.

The product of its (nonzero) digits is 602112, while the sum is 49.

The square root of 864718087 is about 29406.0892843642. The cubic root of 864718087 is about 952.7044220165.

The spelling of 864718087 in words is "eight hundred sixty-four million, seven hundred eighteen thousand, eighty-seven".