698689 has 4 divisors (see below), whose sum is σ = 702400. Its totient is φ = 694980.

The previous prime is 698669. The next prime is 698701. The reversal of 698689 is 986896.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 698689 - 2¹⁵ = 665921 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (698669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1557 + ... + 1954.

It is an arithmetic number, because the mean of its divisors is an integer number (175600).

2⁶⁹⁸⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

698689 is a deficient number, since it is larger than the sum of its proper divisors (3711).

698689 is a wasteful number, since it uses less digits than its factorization.

698689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3710.

The product of its digits is 186624, while the sum is 46.

The square root of 698689 is about 835.8761870038. The cubic root of 698689 is about 88.7349349553.

The spelling of 698689 in words is "six hundred ninety-eight thousand, six hundred eighty-nine".