863388089 has 4 divisors (see below), whose sum is σ = 863455824. Its totient is φ = 863320356.

The previous prime is 863388079. The next prime is 863388121. The reversal of 863388089 is 980883368.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-863388089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 863388089.

It is not an unprimeable number, because it can be changed into a prime (863388079) 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, 8327 + ... + 42380.

It is an arithmetic number, because the mean of its divisors is an integer number (215863956).

Almost surely, 2^863388089 is an apocalyptic number.

It is an amenable number.

863388089 is a deficient number, since it is larger than the sum of its proper divisors (67735).

863388089 is a wasteful number, since it uses less digits than its factorization.

863388089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67734.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The square root of 863388089 is about 29383.4662522991. The cubic root of 863388089 is about 952.2157289661.

The spelling of 863388089 in words is "eight hundred sixty-three million, three hundred eighty-eight thousand, eighty-nine".