863789013 has 12 divisors (see below), whose sum is σ = 1281417228. Its totient is φ = 560295360.

The previous prime is 863789009. The next prime is 863789029. The reversal of 863789013 is 310987368.

It is a happy number.

863789013 is a `hidden beast` number, since 8 + 637 + 8 + 9 + 0 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 679019364 + 184769649 = 26058^2 + 13593^2 .

It is not a de Polignac number, because 863789013 - 2² = 863789009 is a prime.

It is a super-2 number, since 2×863789013² = 1492262917959028338, 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 863789013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863789083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1296648 + ... + 1297313.

It is an arithmetic number, because the mean of its divisors is an integer number (106784769).

Almost surely, 2^863789013 is an apocalyptic number.

It is an amenable number.

863789013 is a deficient number, since it is larger than the sum of its proper divisors (417628215).

863789013 is a wasteful number, since it uses less digits than its factorization.

863789013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594004 (or 2594001 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 863789013 is about 29390.2877325146. The cubic root of 863789013 is about 952.3630968634.

The spelling of 863789013 in words is "eight hundred sixty-three million, seven hundred eighty-nine thousand, thirteen".