812893969 has 6 divisors (see below), whose sum is σ = 814947266. Its totient is φ = 810843600.

The previous prime is 812893951. The next prime is 812893993. The reversal of 812893969 is 969398218.

It can be written as a sum of positive squares in only one way, i.e., 779079744 + 33814225 = 27912^2 + 5815^2 .

It is not a de Polignac number, because 812893969 - 2⁷ = 812893841 is a prime.

It is a super-2 number, since 2×812893969² = 1321593209673145922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812893469) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 698382 + ... + 699544.

Almost surely, 2^812893969 is an apocalyptic number.

It is an amenable number.

812893969 is a deficient number, since it is larger than the sum of its proper divisors (2053297).

812893969 is an frugal number, since it uses more digits than its factorization.

812893969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2927 (or 1764 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 55.

The square root of 812893969 is about 28511.2954633773. The cubic root of 812893969 is about 933.2785846995.

It can be divided in two parts, 81289 and 3969, that added together give a palindrome (85258).

The spelling of 812893969 in words is "eight hundred twelve million, eight hundred ninety-three thousand, nine hundred sixty-nine".