698261 has 2 divisors, whose sum is σ = 698262. Its totient is φ = 698260.

The previous prime is 698251. The next prime is 698263. The reversal of 698261 is 162896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442225 + 256036 = 665^2 + 506^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-698261 is a prime.

It is a Sophie Germain prime.

Together with 698263, 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 (698263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349130 + 349131.

It is an arithmetic number, because the mean of its divisors is an integer number (349131).

2⁶⁹⁸²⁶¹ is an apocalyptic number.

It is an amenable number.

698261 is a deficient number, since it is larger than the sum of its proper divisors (1).

698261 is an equidigital number, since it uses as much as digits as its factorization.

698261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 698261 is about 835.6201290060. The cubic root of 698261 is about 88.7168122952.

It can be divided in two parts, 698 and 261, that added together give a palindrome (959).

The spelling of 698261 in words is "six hundred ninety-eight thousand, two hundred sixty-one".