608921 has 4 divisors (see below), whose sum is σ = 610512. Its totient is φ = 607332.

The previous prime is 608903. The next prime is 608941. The reversal of 608921 is 129806.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 608921 - 2⁶ = 608857 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 608921.

It is not an unprimeable number, because it can be changed into a prime (608941) 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, 170 + ... + 1116.

It is an arithmetic number, because the mean of its divisors is an integer number (152628).

2⁶⁰⁸⁹²¹ is an apocalyptic number.

It is an amenable number.

608921 is a deficient number, since it is larger than the sum of its proper divisors (1591).

608921 is an equidigital number, since it uses as much as digits as its factorization.

608921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 608921 is about 780.3339028903. Note that the first 3 decimals coincide. The cubic root of 608921 is about 84.7592263488.

The spelling of 608921 in words is "six hundred eight thousand, nine hundred twenty-one".