2643678293 has 2 divisors, whose sum is σ = 2643678294. Its totient is φ = 2643678292.

The previous prime is 2643678269. The next prime is 2643678299. The reversal of 2643678293 is 3928763462.

2643678293 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1530922129 + 1112756164 = 39127^2 + 33358^2 .

It is a cyclic number.

It is not a de Polignac number, because 2643678293 - 2⁶ = 2643678229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2643678299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321839146 + 1321839147.

It is an arithmetic number, because the mean of its divisors is an integer number (1321839147).

Almost surely, 2^2643678293 is an apocalyptic number.

It is an amenable number.

2643678293 is a deficient number, since it is larger than the sum of its proper divisors (1).

2643678293 is an equidigital number, since it uses as much as digits as its factorization.

2643678293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 50.

The square root of 2643678293 is about 51416.7121955498. The cubic root of 2643678293 is about 1382.7262309860.

The spelling of 2643678293 in words is "two billion, six hundred forty-three million, six hundred seventy-eight thousand, two hundred ninety-three".