698978513 has 2 divisors, whose sum is σ = 698978514. Its totient is φ = 698978512.

The previous prime is 698978509. The next prime is 698978531. The reversal of 698978513 is 315879896.

Together with next prime (698978531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 673506304 + 25472209 = 25952^2 + 5047^2 .

It is a cyclic number.

It is not a de Polignac number, because 698978513 - 2² = 698978509 is a prime.

It is not a weakly prime, because it can be changed into another prime (698978543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349489256 + 349489257.

It is an arithmetic number, because the mean of its divisors is an integer number (349489257).

Almost surely, 2^698978513 is an apocalyptic number.

It is an amenable number.

698978513 is a deficient number, since it is larger than the sum of its proper divisors (1).

698978513 is an equidigital number, since it uses as much as digits as its factorization.

698978513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 56.

The square root of 698978513 is about 26438.2017731918. The cubic root of 698978513 is about 887.4718951095.

The spelling of 698978513 in words is "six hundred ninety-eight million, nine hundred seventy-eight thousand, five hundred thirteen".