863988049 has 4 divisors (see below), whose sum is σ = 864058864. Its totient is φ = 863917236.

The previous prime is 863988019. The next prime is 863988067. The reversal of 863988049 is 940889368.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 863988049 - 2⁷ = 863987921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863988019) 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, 11907 + ... + 43240.

It is an arithmetic number, because the mean of its divisors is an integer number (216014716).

Almost surely, 2^863988049 is an apocalyptic number.

It is an amenable number.

863988049 is a deficient number, since it is larger than the sum of its proper divisors (70815).

863988049 is a wasteful number, since it uses less digits than its factorization.

863988049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70814.

The product of its (nonzero) digits is 2985984, while the sum is 55.

The square root of 863988049 is about 29393.6736220568. The cubic root of 863988049 is about 952.4362397185.

The spelling of 863988049 in words is "eight hundred sixty-three million, nine hundred eighty-eight thousand, forty-nine".