863679859 has 4 divisors (see below), whose sum is σ = 987062704. Its totient is φ = 740297016.

The previous prime is 863679829. The next prime is 863679893. The reversal of 863679859 is 958976368.

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 863679859 - 2⁷ = 863679731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 863679797 and 863679806.

It is not an unprimeable number, because it can be changed into a prime (863679829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61691412 + ... + 61691425.

It is an arithmetic number, because the mean of its divisors is an integer number (246765676).

Almost surely, 2^863679859 is an apocalyptic number.

863679859 is a deficient number, since it is larger than the sum of its proper divisors (123382845).

863679859 is a wasteful number, since it uses less digits than its factorization.

863679859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123382844.

The product of its digits is 19595520, while the sum is 61.

The square root of 863679859 is about 29388.4306998519. The cubic root of 863679859 is about 952.3229795743.

The spelling of 863679859 in words is "eight hundred sixty-three million, six hundred seventy-nine thousand, eight hundred fifty-nine".