812478873 has 4 divisors (see below), whose sum is σ = 1083305168. Its totient is φ = 541652580.

The previous prime is 812478857. The next prime is 812478883. The reversal of 812478873 is 378874218.

It is a happy number.

812478873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 812478873 - 2⁴ = 812478857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812478803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135413143 + ... + 135413148.

It is an arithmetic number, because the mean of its divisors is an integer number (270826292).

Almost surely, 2^812478873 is an apocalyptic number.

It is an amenable number.

812478873 is a deficient number, since it is larger than the sum of its proper divisors (270826295).

812478873 is a wasteful number, since it uses less digits than its factorization.

812478873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270826294.

The product of its digits is 602112, while the sum is 48.

The square root of 812478873 is about 28504.0150329739. The cubic root of 812478873 is about 933.1197012611.

The spelling of 812478873 in words is "eight hundred twelve million, four hundred seventy-eight thousand, eight hundred seventy-three".