863749769 has 4 divisors (see below), whose sum is σ = 864329796. Its totient is φ = 863169744.

The previous prime is 863749763. The next prime is 863749771. The reversal of 863749769 is 967947368.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 804459769 + 59290000 = 28363^2 + 7700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-863749769 is a prime.

It is a super-2 number, since 2×863749769² = 1492127326895106722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863749763) 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 3 ways as a sum of consecutive naturals, for example, 287774 + ... + 290759.

It is an arithmetic number, because the mean of its divisors is an integer number (216082449).

Almost surely, 2^863749769 is an apocalyptic number.

It is an amenable number.

863749769 is a deficient number, since it is larger than the sum of its proper divisors (580027).

863749769 is a wasteful number, since it uses less digits than its factorization.

863749769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580026.

The product of its digits is 13716864, while the sum is 59.

The square root of 863749769 is about 29389.6200894125. The cubic root of 863749769 is about 952.3486739342.

The spelling of 863749769 in words is "eight hundred sixty-three million, seven hundred forty-nine thousand, seven hundred sixty-nine".