812373121 has 4 divisors (see below), whose sum is σ = 928426432. Its totient is φ = 696319812.

The previous prime is 812373113. The next prime is 812373131. The reversal of 812373121 is 121373218.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121373218 = 2 ⋅60686609.

It is a cyclic number.

It is not a de Polignac number, because 812373121 - 2³ = 812373113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 812373121.

It is not an unprimeable number, because it can be changed into a prime (812373131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58026645 + ... + 58026658.

It is an arithmetic number, because the mean of its divisors is an integer number (232106608).

Almost surely, 2^812373121 is an apocalyptic number.

It is an amenable number.

812373121 is a deficient number, since it is larger than the sum of its proper divisors (116053311).

812373121 is a wasteful number, since it uses less digits than its factorization.

812373121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116053310.

The product of its digits is 2016, while the sum is 28.

The square root of 812373121 is about 28502.1599356961. The cubic root of 812373121 is about 933.0792146467.

The spelling of 812373121 in words is "eight hundred twelve million, three hundred seventy-three thousand, one hundred twenty-one".