812107489 has 2 divisors, whose sum is σ = 812107490. Its totient is φ = 812107488.

The previous prime is 812107453. The next prime is 812107531. The reversal of 812107489 is 984701218.

It is a happy number.

812107489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 489294400 + 322813089 = 22120^2 + 17967^2 .

It is a cyclic number.

It is not a de Polignac number, because 812107489 - 2¹⁵ = 812074721 is a prime.

It is not a weakly prime, because it can be changed into another prime (812107889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406053744 + 406053745.

It is an arithmetic number, because the mean of its divisors is an integer number (406053745).

Almost surely, 2^812107489 is an apocalyptic number.

It is an amenable number.

812107489 is a deficient number, since it is larger than the sum of its proper divisors (1).

812107489 is an equidigital number, since it uses as much as digits as its factorization.

812107489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 812107489 is about 28497.4996973419. The cubic root of 812107489 is about 932.9775032897.

The spelling of 812107489 in words is "eight hundred twelve million, one hundred seven thousand, four hundred eighty-nine".