698491 has 2 divisors, whose sum is σ = 698492. Its totient is φ = 698490.

The previous prime is 698483. The next prime is 698507. The reversal of 698491 is 194896.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 698491 - 2³ = 698483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 698491.

It is not a weakly prime, because it can be changed into another prime (698471) 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, 349245 + 349246.

It is an arithmetic number, because the mean of its divisors is an integer number (349246).

2⁶⁹⁸⁴⁹¹ is an apocalyptic number.

698491 is a deficient number, since it is larger than the sum of its proper divisors (1).

698491 is an equidigital number, since it uses as much as digits as its factorization.

698491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 698491 is about 835.7577400180. The cubic root of 698491 is about 88.7265520281.

The spelling of 698491 in words is "six hundred ninety-eight thousand, four hundred ninety-one".