698211643 has 2 divisors, whose sum is σ = 698211644. Its totient is φ = 698211642.

The previous prime is 698211637. The next prime is 698211653. The reversal of 698211643 is 346112896.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-698211643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 698211596 and 698211605.

It is not a weakly prime, because it can be changed into another prime (698211653) 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, 349105821 + 349105822.

It is an arithmetic number, because the mean of its divisors is an integer number (349105822).

Almost surely, 2^698211643 is an apocalyptic number.

698211643 is a deficient number, since it is larger than the sum of its proper divisors (1).

698211643 is an equidigital number, since it uses as much as digits as its factorization.

698211643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 698211643 is about 26423.6947265139. The cubic root of 698211643 is about 887.1472191218.

The spelling of 698211643 in words is "six hundred ninety-eight million, two hundred eleven thousand, six hundred forty-three".