812672117 has 2 divisors, whose sum is σ = 812672118. Its totient is φ = 812672116.

The previous prime is 812672089. The next prime is 812672129. The reversal of 812672117 is 711276218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 583270801 + 229401316 = 24151^2 + 15146^2 .

It is a cyclic number.

It is not a de Polignac number, because 812672117 - 2⁶ = 812672053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812672137) 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 as a sum of consecutive naturals, namely, 406336058 + 406336059.

It is an arithmetic number, because the mean of its divisors is an integer number (406336059).

Almost surely, 2^812672117 is an apocalyptic number.

It is an amenable number.

812672117 is a deficient number, since it is larger than the sum of its proper divisors (1).

812672117 is an equidigital number, since it uses as much as digits as its factorization.

812672117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 35.

The square root of 812672117 is about 28507.4045995071. The cubic root of 812672117 is about 933.1936746674.

The spelling of 812672117 in words is "eight hundred twelve million, six hundred seventy-two thousand, one hundred seventeen".