698009 has 4 divisors (see below), whose sum is σ = 751716. Its totient is φ = 644304.

The previous prime is 697999. The next prime is 698017. The reversal of 698009 is 900896.

It is a happy number.

698009 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.

It can be written as a sum of positive squares in 2 ways, for example, as 120409 + 577600 = 347^2 + 760^2 .

It is a cyclic number.

It is not a de Polignac number, because 698009 - 2⁴ = 697993 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 698009.

It is not an unprimeable number, because it can be changed into a prime (698039) 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, 26834 + ... + 26859.

It is an arithmetic number, because the mean of its divisors is an integer number (187929).

2⁶⁹⁸⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

698009 is a deficient number, since it is larger than the sum of its proper divisors (53707).

698009 is a wasteful number, since it uses less digits than its factorization.

698009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53706.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 698009 is about 835.4693291797. The cubic root of 698009 is about 88.7061384800.

The spelling of 698009 in words is "six hundred ninety-eight thousand, nine".