698321 has 4 divisors (see below), whose sum is σ = 752052. Its totient is φ = 644592.

The previous prime is 698311. The next prime is 698329. The reversal of 698321 is 123896.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 215296 + 483025 = 464^2 + 695^2 .

It is a de Polignac number, because none of the positive numbers 2^k-698321 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698329) 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 in 3 ways as a sum of consecutive naturals, for example, 26846 + ... + 26871.

It is an arithmetic number, because the mean of its divisors is an integer number (188013).

2⁶⁹⁸³²¹ is an apocalyptic number.

It is an amenable number.

698321 is a deficient number, since it is larger than the sum of its proper divisors (53731).

698321 is a wasteful number, since it uses less digits than its factorization.

698321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53730.

The product of its digits is 2592, while the sum is 29.

The square root of 698321 is about 835.6560297156. The cubic root of 698321 is about 88.7193533013.

The spelling of 698321 in words is "six hundred ninety-eight thousand, three hundred twenty-one".