1223142379 has 2 divisors, whose sum is σ = 1223142380. Its totient is φ = 1223142378.

The previous prime is 1223142377. The next prime is 1223142409. The reversal of 1223142379 is 9732413221.

It is a weak prime.

It is an emirp because it is prime and its reverse (9732413221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1223142379 - 2¹ = 1223142377 is a prime.

Together with 1223142377, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1223142377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611571189 + 611571190.

It is an arithmetic number, because the mean of its divisors is an integer number (611571190).

Almost surely, 2^1223142379 is an apocalyptic number.

1223142379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223142379 is an equidigital number, since it uses as much as digits as its factorization.

1223142379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 1223142379 is about 34973.4524889951. The cubic root of 1223142379 is about 1069.4463549164.

The spelling of 1223142379 in words is "one billion, two hundred twenty-three million, one hundred forty-two thousand, three hundred seventy-nine".