2321020309 has 2 divisors, whose sum is σ = 2321020310. Its totient is φ = 2321020308.

The previous prime is 2321020301. The next prime is 2321020337. The reversal of 2321020309 is 9030201232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2298723025 + 22297284 = 47945^2 + 4722^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321020309 - 2³ = 2321020301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2321020309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2321020301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160510154 + 1160510155.

It is an arithmetic number, because the mean of its divisors is an integer number (1160510155).

Almost surely, 2^2321020309 is an apocalyptic number.

It is an amenable number.

2321020309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321020309 is an equidigital number, since it uses as much as digits as its factorization.

2321020309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 2321020309 is about 48176.9686572329. The cubic root of 2321020309 is about 1324.0152282136.

The spelling of 2321020309 in words is "two billion, three hundred twenty-one million, twenty thousand, three hundred nine".