863436799369 has 9 divisors (see below), whose sum is σ = 877881175509. Its totient is φ = 849226344960.

The previous prime is 863436799367. The next prime is 863436799441. The reversal of 863436799369 is 963997634368.

The square root of 863436799369 is 929213.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 600074876025 + 263361923344 = 774645^2 + 513188^2 .

It is not a de Polignac number, because 863436799369 - 2¹ = 863436799367 is a prime.

It is a super-2 number, since 2×863436799369² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863436799367) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 56674377 + ... + 56689609.

Almost surely, 2^863436799369 is an apocalyptic number.

863436799369 is the 929213-rd square number.

863436799369 is the 464607-th centered octagonal number.

It is an amenable number.

863436799369 is a deficient number, since it is larger than the sum of its proper divisors (14444376140).

863436799369 is an frugal number, since it uses more digits than its factorization.

863436799369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30588 (or 15294 counting only the distinct ones).

The product of its digits is 952342272, while the sum is 73.

The spelling of 863436799369 in words is "eight hundred sixty-three billion, four hundred thirty-six million, seven hundred ninety-nine thousand, three hundred sixty-nine".