812016893 has 2 divisors, whose sum is σ = 812016894. Its totient is φ = 812016892.

The previous prime is 812016797. The next prime is 812016923. The reversal of 812016893 is 398610218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 762974884 + 49042009 = 27622^2 + 7003^2 .

It is a cyclic number.

It is not a de Polignac number, because 812016893 - 2⁸ = 812016637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812010893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406008446 + 406008447.

It is an arithmetic number, because the mean of its divisors is an integer number (406008447).

Almost surely, 2^812016893 is an apocalyptic number.

It is an amenable number.

812016893 is a deficient number, since it is larger than the sum of its proper divisors (1).

812016893 is an equidigital number, since it uses as much as digits as its factorization.

812016893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 812016893 is about 28495.9101100491. The cubic root of 812016893 is about 932.9428087144.

The spelling of 812016893 in words is "eight hundred twelve million, sixteen thousand, eight hundred ninety-three".