698609 has 4 divisors (see below), whose sum is σ = 709104. Its totient is φ = 688116.

The previous prime is 698591. The next prime is 698641. The reversal of 698609 is 906896.

698609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 698609 - 2¹² = 694513 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 5147 + ... + 5280.

It is an arithmetic number, because the mean of its divisors is an integer number (177276).

2⁶⁹⁸⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

698609 is a deficient number, since it is larger than the sum of its proper divisors (10495).

698609 is a wasteful number, since it uses less digits than its factorization.

698609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10494.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 698609 is about 835.8283316567. The cubic root of 698609 is about 88.7315481047.

The spelling of 698609 in words is "six hundred ninety-eight thousand, six hundred nine".