2543764693 has 2 divisors, whose sum is σ = 2543764694. Its totient is φ = 2543764692.

The previous prime is 2543764651. The next prime is 2543764697. The reversal of 2543764693 is 3964673452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1512198769 + 1031565924 = 38887^2 + 32118^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543764693 - 2¹⁷ = 2543633621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2543764697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271882346 + 1271882347.

It is an arithmetic number, because the mean of its divisors is an integer number (1271882347).

Almost surely, 2^2543764693 is an apocalyptic number.

It is an amenable number.

2543764693 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543764693 is an equidigital number, since it uses as much as digits as its factorization.

2543764693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 49.

The square root of 2543764693 is about 50435.7481653638. The cubic root of 2543764693 is about 1365.0827489898.

The spelling of 2543764693 in words is "two billion, five hundred forty-three million, seven hundred sixty-four thousand, six hundred ninety-three".