863784649 has 8 divisors (see below), whose sum is σ = 1063119680. Its totient is φ = 683433936.

The previous prime is 863784629. The next prime is 863784661. The reversal of 863784649 is 946487368.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 863784649 - 2⁵ = 863784617 is a prime.

It is a super-2 number, since 2×863784649² = 1492247839696106402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 863784649.

It is not an unprimeable number, because it can be changed into a prime (863784629) 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 7 ways as a sum of consecutive naturals, for example, 4745979 + ... + 4746160.

It is an arithmetic number, because the mean of its divisors is an integer number (132889960).

Almost surely, 2^863784649 is an apocalyptic number.

It is an amenable number.

863784649 is a deficient number, since it is larger than the sum of its proper divisors (199335031).

863784649 is a wasteful number, since it uses less digits than its factorization.

863784649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9492159.

The product of its digits is 6967296, while the sum is 55.

The square root of 863784649 is about 29390.2134902079. The cubic root of 863784649 is about 952.3614930305.

The spelling of 863784649 in words is "eight hundred sixty-three million, seven hundred eighty-four thousand, six hundred forty-nine".