860807987 has 4 divisors (see below), whose sum is σ = 927024000. Its totient is φ = 794591976.

The previous prime is 860807947. The next prime is 860807999. The reversal of 860807987 is 789708068.

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 860807987 - 2¹⁰ = 860806963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (860807917) 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, 33107987 + ... + 33108012.

It is an arithmetic number, because the mean of its divisors is an integer number (231756000).

Almost surely, 2^860807987 is an apocalyptic number.

860807987 is a deficient number, since it is larger than the sum of its proper divisors (66216013).

860807987 is a wasteful number, since it uses less digits than its factorization.

860807987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66216012.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The square root of 860807987 is about 29339.5294270375. The cubic root of 860807987 is about 951.2662660001.

The spelling of 860807987 in words is "eight hundred sixty million, eight hundred seven thousand, nine hundred eighty-seven".