321400007 has 4 divisors (see below), whose sum is σ = 322371336. Its totient is φ = 320428680.

The previous prime is 321399997. The next prime is 321400021. The reversal of 321400007 is 700004123.

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 321400007 - 2¹⁸ = 321137863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321400097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485168 + ... + 485829.

It is an arithmetic number, because the mean of its divisors is an integer number (80592834).

Almost surely, 2^321400007 is an apocalyptic number.

321400007 is a deficient number, since it is larger than the sum of its proper divisors (971329).

321400007 is an equidigital number, since it uses as much as digits as its factorization.

321400007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971328.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 321400007 is about 17927.6324984645. The cubic root of 321400007 is about 684.9864184708.

The spelling of 321400007 in words is "three hundred twenty-one million, four hundred thousand, seven".