863946986 has 16 divisors (see below), whose sum is σ = 1559002560. Its totient is φ = 350775360.

The previous prime is 863946983. The next prime is 863947009. The reversal of 863946986 is 689649368.

It is not an unprimeable number, because it can be changed into a prime (863946983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1623695 + ... + 1624226.

It is an arithmetic number, because the mean of its divisors is an integer number (97437660).

Almost surely, 2^863946986 is an apocalyptic number.

863946986 is a deficient number, since it is larger than the sum of its proper divisors (695055574).

863946986 is a wasteful number, since it uses less digits than its factorization.

863946986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247949.

The product of its digits is 13436928, while the sum is 59.

The square root of 863946986 is about 29392.9751131116. The cubic root of 863946986 is about 952.4211505789.

The spelling of 863946986 in words is "eight hundred sixty-three million, nine hundred forty-six thousand, nine hundred eighty-six".