321906049 has 4 divisors (see below), whose sum is σ = 323956564.
Its totient is φ = 319855536.
The previous prime is 321906029. The next prime is 321906059. The reversal of 321906049 is 940609123.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 121881600 + 200024449 = 11040^2 + 14143^2
It is a cyclic number.
It is not a de Polignac number, because 321906049 - 25 = 321906017 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (321906029) 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, 1025022 + ... + 1025335.
It is an arithmetic number, because the mean of its divisors is an integer number (80989141).
Almost surely, 2321906049 is an apocalyptic number.
It is an amenable number.
321906049 is a deficient number, since it is larger than the sum of its proper divisors (2050515).
321906049 is a wasteful number, since it uses less digits than its factorization.
321906049 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2050514.
The product of its (nonzero) digits is 11664, while the sum is 34.
The square root of 321906049 is about 17941.7404116769.
The cubic root of 321906049 is about 685.3457320214.
The spelling of 321906049 in words is "three hundred twenty-one million, nine hundred six thousand, forty-nine".