321109907 has 4 divisors (see below), whose sum is σ = 321178440. Its totient is φ = 321041376.

The previous prime is 321109903. The next prime is 321109913. The reversal of 321109907 is 709901123.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321109907 - 2² = 321109903 is a prime.

It is a super-2 number, since 2×321109907² = 206223144747097298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321109903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26678 + ... + 36795.

It is an arithmetic number, because the mean of its divisors is an integer number (80294610).

Almost surely, 2^321109907 is an apocalyptic number.

321109907 is a deficient number, since it is larger than the sum of its proper divisors (68533).

321109907 is an equidigital number, since it uses as much as digits as its factorization.

321109907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68532.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 321109907 is about 17919.5398099393. The cubic root of 321109907 is about 684.7802637590.

The spelling of 321109907 in words is "three hundred twenty-one million, one hundred nine thousand, nine hundred seven".