2643245369 has 2 divisors, whose sum is σ = 2643245370. Its totient is φ = 2643245368.

The previous prime is 2643245299. The next prime is 2643245377. The reversal of 2643245369 is 9635423462.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1813056400 + 830188969 = 42580^2 + 28813^2 .

It is a cyclic number.

It is not a de Polignac number, because 2643245369 - 2¹² = 2643241273 is a prime.

It is a super-2 number, since 2×2643245369² = 13973492161479892322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2643245069) 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, 1321622684 + 1321622685.

It is an arithmetic number, because the mean of its divisors is an integer number (1321622685).

Almost surely, 2^2643245369 is an apocalyptic number.

It is an amenable number.

2643245369 is a deficient number, since it is larger than the sum of its proper divisors (1).

2643245369 is an equidigital number, since it uses as much as digits as its factorization.

2643245369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 44.

The square root of 2643245369 is about 51412.5020690493. The cubic root of 2643245369 is about 1382.6507492791.

The spelling of 2643245369 in words is "two billion, six hundred forty-three million, two hundred forty-five thousand, three hundred sixty-nine".