2143294693 has 2 divisors, whose sum is σ = 2143294694. Its totient is φ = 2143294692.

The previous prime is 2143294687. The next prime is 2143294697. The reversal of 2143294693 is 3964923412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2104332129 + 38962564 = 45873^2 + 6242^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143294693 - 2¹³ = 2143286501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143294697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071647346 + 1071647347.

It is an arithmetic number, because the mean of its divisors is an integer number (1071647347).

Almost surely, 2^2143294693 is an apocalyptic number.

It is an amenable number.

2143294693 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143294693 is an equidigital number, since it uses as much as digits as its factorization.

2143294693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 43.

The square root of 2143294693 is about 46295.7308290948. The cubic root of 2143294693 is about 1289.3197328727.

The spelling of 2143294693 in words is "two billion, one hundred forty-three million, two hundred ninety-four thousand, six hundred ninety-three".