812214901 has 2 divisors, whose sum is σ = 812214902. Its totient is φ = 812214900.

The previous prime is 812214889. The next prime is 812214929. The reversal of 812214901 is 109412218.

812214901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (812214929) can be obtained adding 812214901 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 698280625 + 113934276 = 26425^2 + 10674^2 .

It is a cyclic number.

It is not a de Polignac number, because 812214901 - 2⁷ = 812214773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 812214901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812214101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406107450 + 406107451.

It is an arithmetic number, because the mean of its divisors is an integer number (406107451).

Almost surely, 2^812214901 is an apocalyptic number.

It is an amenable number.

812214901 is a deficient number, since it is larger than the sum of its proper divisors (1).

812214901 is an equidigital number, since it uses as much as digits as its factorization.

812214901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 812214901 is about 28499.3842214178. The cubic root of 812214901 is about 933.0186343645.

The spelling of 812214901 in words is "eight hundred twelve million, two hundred fourteen thousand, nine hundred one".