2643273397 has 2 divisors, whose sum is σ = 2643273398. Its totient is φ = 2643273396.

The previous prime is 2643273379. The next prime is 2643273431. The reversal of 2643273397 is 7933723462.

Together with previous prime (2643273379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1713877201 + 929396196 = 41399^2 + 30486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2643273397 - 2¹⁵ = 2643240629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2643273097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321636698 + 1321636699.

It is an arithmetic number, because the mean of its divisors is an integer number (1321636699).

Almost surely, 2^2643273397 is an apocalyptic number.

It is an amenable number.

2643273397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2643273397 is an equidigital number, since it uses as much as digits as its factorization.

2643273397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 46.

The square root of 2643273397 is about 51412.7746479413. The cubic root of 2643273397 is about 1382.6556363016.

The spelling of 2643273397 in words is "two billion, six hundred forty-three million, two hundred seventy-three thousand, three hundred ninety-seven".