609871321 has 4 divisors (see below), whose sum is σ = 609930000. Its totient is φ = 609812644.

The previous prime is 609871303. The next prime is 609871337. The reversal of 609871321 is 123178906.

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 609871321 - 2¹³ = 609863129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (609871621) 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, 9091 + ... + 36088.

It is an arithmetic number, because the mean of its divisors is an integer number (152482500).

Almost surely, 2^609871321 is an apocalyptic number.

It is an amenable number.

609871321 is a deficient number, since it is larger than the sum of its proper divisors (58679).

609871321 is a wasteful number, since it uses less digits than its factorization.

609871321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58678.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 609871321 is about 24695.5729028504. The cubic root of 609871321 is about 848.0329698415.

The spelling of 609871321 in words is "six hundred nine million, eight hundred seventy-one thousand, three hundred twenty-one".