698742101 has 2 divisors, whose sum is σ = 698742102. Its totient is φ = 698742100.

The previous prime is 698742097. The next prime is 698742103. The reversal of 698742101 is 101247896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 680688100 + 18054001 = 26090^2 + 4249^2 .

It is a cyclic number.

It is not a de Polignac number, because 698742101 - 2² = 698742097 is a prime.

It is a Sophie Germain prime.

Together with 698742103, it forms a pair of twin primes.

It is a Chen 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 (698742103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349371050 + 349371051.

It is an arithmetic number, because the mean of its divisors is an integer number (349371051).

Almost surely, 2^698742101 is an apocalyptic number.

It is an amenable number.

698742101 is a deficient number, since it is larger than the sum of its proper divisors (1).

698742101 is an equidigital number, since it uses as much as digits as its factorization.

698742101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 698742101 is about 26433.7303648199. The cubic root of 698742101 is about 887.3718287696.

Adding to 698742101 its reverse (101247896), we get a palindrome (799989997).

The spelling of 698742101 in words is "six hundred ninety-eight million, seven hundred forty-two thousand, one hundred one".