812988099697 has 2 divisors, whose sum is σ = 812988099698. Its totient is φ = 812988099696.

The previous prime is 812988099683. The next prime is 812988099719. The reversal of 812988099697 is 796990889218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 494439610896 + 318548488801 = 703164^2 + 564401^2 .

It is a cyclic number.

It is not a de Polignac number, because 812988099697 - 2⁷ = 812988099569 is a prime.

It is a super-2 number, since 2×812988099697² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (812988799697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406494049848 + 406494049849.

It is an arithmetic number, because the mean of its divisors is an integer number (406494049849).

Almost surely, 2^812988099697 is an apocalyptic number.

It is an amenable number.

812988099697 is a deficient number, since it is larger than the sum of its proper divisors (1).

812988099697 is an equidigital number, since it uses as much as digits as its factorization.

812988099697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282175488, while the sum is 76.

The spelling of 812988099697 in words is "eight hundred twelve billion, nine hundred eighty-eight million, ninety-nine thousand, six hundred ninety-seven".