609898 has 4 divisors (see below), whose sum is σ = 914850. Its totient is φ = 304948.

The previous prime is 609887. The next prime is 609907. The reversal of 609898 is 898906.

It is a happy number.

609898 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 only one way, i.e., 588289 + 21609 = 767^2 + 147^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 609898.

It is an unprimeable number.

609898 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152473 + ... + 152476.

2⁶⁰⁹⁸⁹⁸ is an apocalyptic number.

609898 is a deficient number, since it is larger than the sum of its proper divisors (304952).

609898 is a wasteful number, since it uses less digits than its factorization.

609898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304951.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 609898 is about 780.9596660520. The cubic root of 609898 is about 84.8045335478.

The spelling of 609898 in words is "six hundred nine thousand, eight hundred ninety-eight".