812422417 has 2 divisors, whose sum is σ = 812422418. Its totient is φ = 812422416.

The previous prime is 812422397. The next prime is 812422439. The reversal of 812422417 is 714224218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 807923776 + 4498641 = 28424^2 + 2121^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812422417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (812422717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406211208 + 406211209.

It is an arithmetic number, because the mean of its divisors is an integer number (406211209).

Almost surely, 2^812422417 is an apocalyptic number.

It is an amenable number.

812422417 is a deficient number, since it is larger than the sum of its proper divisors (1).

812422417 is an equidigital number, since it uses as much as digits as its factorization.

812422417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7168, while the sum is 31.

The square root of 812422417 is about 28503.0246991438. The cubic root of 812422417 is about 933.0980878063.

The spelling of 812422417 in words is "eight hundred twelve million, four hundred twenty-two thousand, four hundred seventeen".