698211961 has 2 divisors, whose sum is σ = 698211962. Its totient is φ = 698211960.

The previous prime is 698211953. The next prime is 698212007. The reversal of 698211961 is 169112896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 654387561 + 43824400 = 25581^2 + 6620^2 .

It is a cyclic number.

It is not a de Polignac number, because 698211961 - 2³ = 698211953 is a prime.

It is not a weakly prime, because it can be changed into another prime (698211061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349105980 + 349105981.

It is an arithmetic number, because the mean of its divisors is an integer number (349105981).

Almost surely, 2^698211961 is an apocalyptic number.

It is an amenable number.

698211961 is a deficient number, since it is larger than the sum of its proper divisors (1).

698211961 is an equidigital number, since it uses as much as digits as its factorization.

698211961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 43.

The square root of 698211961 is about 26423.7007438398. The cubic root of 698211961 is about 887.1473538053.

The spelling of 698211961 in words is "six hundred ninety-eight million, two hundred eleven thousand, nine hundred sixty-one".