698401 has 8 divisors (see below), whose sum is σ = 768384. Its totient is φ = 629520.

The previous prime is 698393. The next prime is 698413. The reversal of 698401 is 104896.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 698401 - 2³ = 698393 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 698401.

It is not an unprimeable number, because it can be changed into a prime (698471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1720 + ... + 2086.

It is an arithmetic number, because the mean of its divisors is an integer number (96048).

2⁶⁹⁸⁴⁰¹ is an apocalyptic number.

It is an amenable number.

698401 is a deficient number, since it is larger than the sum of its proper divisors (69983).

698401 is a wasteful number, since it uses less digits than its factorization.

698401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 698401 is about 835.7038949293. The cubic root of 698401 is about 88.7227410830.

Subtracting from 698401 its reverse (104896), we obtain a triangular number (593505 = T₁₀₈₉).

The spelling of 698401 in words is "six hundred ninety-eight thousand, four hundred one".