2109453943 has 2 divisors, whose sum is σ = 2109453944. Its totient is φ = 2109453942.

The previous prime is 2109453937. The next prime is 2109453989. The reversal of 2109453943 is 3493549012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2109453943 - 2²¹ = 2107356791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2109453896 and 2109453905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2109453043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054726971 + 1054726972.

It is an arithmetic number, because the mean of its divisors is an integer number (1054726972).

Almost surely, 2^2109453943 is an apocalyptic number.

2109453943 is a deficient number, since it is larger than the sum of its proper divisors (1).

2109453943 is an equidigital number, since it uses as much as digits as its factorization.

2109453943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 2109453943 is about 45928.7920916716. The cubic root of 2109453943 is about 1282.4979586976.

The spelling of 2109453943 in words is "two billion, one hundred nine million, four hundred fifty-three thousand, nine hundred forty-three".