609902 has 8 divisors (see below), whose sum is σ = 918216. Its totient is φ = 303832.

The previous prime is 609887. The next prime is 609907. The reversal of 609902 is 209906.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609907) by changing a digit.

609902 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608 + ... + 1260.

It is an arithmetic number, because the mean of its divisors is an integer number (114777).

2⁶⁰⁹⁹⁰² is an apocalyptic number.

609902 is a deficient number, since it is larger than the sum of its proper divisors (308314).

609902 is a wasteful number, since it uses less digits than its factorization.

609902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 609902 is about 780.9622269995. The cubic root of 609902 is about 84.8047189435.

The spelling of 609902 in words is "six hundred nine thousand, nine hundred two".