2143113409 has 2 divisors, whose sum is σ = 2143113410. Its totient is φ = 2143113408.

The previous prime is 2143113407. The next prime is 2143113431. The reversal of 2143113409 is 9043113412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2070523009 + 72590400 = 45503^2 + 8520^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143113409 - 2¹ = 2143113407 is a prime.

Together with 2143113407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2143113407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071556704 + 1071556705.

It is an arithmetic number, because the mean of its divisors is an integer number (1071556705).

Almost surely, 2^2143113409 is an apocalyptic number.

It is an amenable number.

2143113409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143113409 is an equidigital number, since it uses as much as digits as its factorization.

2143113409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 2143113409 is about 46293.7728965786. The cubic root of 2143113409 is about 1289.2833807977.

The spelling of 2143113409 in words is "two billion, one hundred forty-three million, one hundred thirteen thousand, four hundred nine".