812130799489 has 3 divisors (see below), whose sum is σ = 812131700673. Its totient is φ = 812129898306.

The previous prime is 812130799471. The next prime is 812130799499. The reversal of 812130799489 is 984997031218.

The square root of 812130799489 is 901183.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 984997031218 = 2 ⋅492498515609.

It is not a de Polignac number, because 812130799489 - 2⁹ = 812130798977 is a prime.

It is a super-2 number, since 2×812130799489² (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 (812130799499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 450592 + ... + 1351774.

It is an arithmetic number, because the mean of its divisors is an integer number (270710566891).

Almost surely, 2^812130799489 is an apocalyptic number.

812130799489 is the 901183-rd square number.

812130799489 is the 450592-nd centered octagonal number.

It is an amenable number.

812130799489 is a deficient number, since it is larger than the sum of its proper divisors (901184).

812130799489 is an frugal number, since it uses more digits than its factorization.

812130799489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802366 (or 901183 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 61.

The spelling of 812130799489 in words is "eight hundred twelve billion, one hundred thirty million, seven hundred ninety-nine thousand, four hundred eighty-nine".