865799967 has 4 divisors (see below), whose sum is σ = 1154399960. Its totient is φ = 577199976.

The previous prime is 865799939. The next prime is 865799989. The reversal of 865799967 is 769997568.

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

It is not a de Polignac number, because 865799967 - 2¹² = 865795871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 865799898 and 865799907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865799917) 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, 144299992 + ... + 144299997.

It is an arithmetic number, because the mean of its divisors is an integer number (288599990).

Almost surely, 2^865799967 is an apocalyptic number.

865799967 is a deficient number, since it is larger than the sum of its proper divisors (288599993).

865799967 is a wasteful number, since it uses less digits than its factorization.

865799967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288599992.

The product of its digits is 51438240, while the sum is 66.

The square root of 865799967 is about 29424.4790438166. The cubic root of 865799967 is about 953.1015773902.

The spelling of 865799967 in words is "eight hundred sixty-five million, seven hundred ninety-nine thousand, nine hundred sixty-seven".