2316809921 has 2 divisors, whose sum is σ = 2316809922. Its totient is φ = 2316809920.

The previous prime is 2316809909. The next prime is 2316809923. The reversal of 2316809921 is 1299086132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1906544896 + 410265025 = 43664^2 + 20255^2 .

It is a cyclic number.

It is not a de Polignac number, because 2316809921 - 2¹⁴ = 2316793537 is a prime.

Together with 2316809923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2316809923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1158404960 + 1158404961.

It is an arithmetic number, because the mean of its divisors is an integer number (1158404961).

Almost surely, 2^2316809921 is an apocalyptic number.

It is an amenable number.

2316809921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2316809921 is an equidigital number, since it uses as much as digits as its factorization.

2316809921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 2316809921 is about 48133.2517185365. The cubic root of 2316809921 is about 1323.2141448797.

The spelling of 2316809921 in words is "two billion, three hundred sixteen million, eight hundred nine thousand, nine hundred twenty-one".