321499009 has 12 divisors (see below), whose sum is σ = 349111296. Its totient is φ = 295933872.

The previous prime is 321499001. The next prime is 321499051. The reversal of 321499009 is 900994123.

It is not a de Polignac number, because 321499009 - 2³ = 321499001 is a prime.

It is a super-2 number, since 2×321499009² = 206723225575964162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321499001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62244 + ... + 67210.

It is an arithmetic number, because the mean of its divisors is an integer number (29092608).

Almost surely, 2^321499009 is an apocalyptic number.

It is an amenable number.

321499009 is a deficient number, since it is larger than the sum of its proper divisors (27612287).

321499009 is a wasteful number, since it uses less digits than its factorization.

321499009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5376 (or 5363 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 321499009 is about 17930.3934424206. The cubic root of 321499009 is about 685.0567441937.

The spelling of 321499009 in words is "three hundred twenty-one million, four hundred ninety-nine thousand, nine".