321309949 has 2 divisors, whose sum is σ = 321309950. Its totient is φ = 321309948.

The previous prime is 321309943. The next prime is 321309983. The reversal of 321309949 is 949903123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199317924 + 121992025 = 14118^2 + 11045^2 .

It is a cyclic number.

It is not a de Polignac number, because 321309949 - 2⁵ = 321309917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321309943) 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 as a sum of consecutive naturals, namely, 160654974 + 160654975.

It is an arithmetic number, because the mean of its divisors is an integer number (160654975).

Almost surely, 2^321309949 is an apocalyptic number.

It is an amenable number.

321309949 is a deficient number, since it is larger than the sum of its proper divisors (1).

321309949 is an equidigital number, since it uses as much as digits as its factorization.

321309949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 321309949 is about 17925.1206132623. The cubic root of 321309949 is about 684.9224335421.

The spelling of 321309949 in words is "three hundred twenty-one million, three hundred nine thousand, nine hundred forty-nine".