1222879543 has 2 divisors, whose sum is σ = 1222879544. Its totient is φ = 1222879542.

The previous prime is 1222879531. The next prime is 1222879579. The reversal of 1222879543 is 3459782221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222879543 - 2²¹ = 1220782391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222879543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222879523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611439771 + 611439772.

It is an arithmetic number, because the mean of its divisors is an integer number (611439772).

Almost surely, 2^1222879543 is an apocalyptic number.

1222879543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222879543 is an equidigital number, since it uses as much as digits as its factorization.

1222879543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The square root of 1222879543 is about 34969.6946369281. The cubic root of 1222879543 is about 1069.3697464628.

The spelling of 1222879543 in words is "one billion, two hundred twenty-two million, eight hundred seventy-nine thousand, five hundred forty-three".