1223783842 has 8 divisors (see below), whose sum is σ = 1837637676. Its totient is φ = 611237952.

The previous prime is 1223783837. The next prime is 1223783851. The reversal of 1223783842 is 2483873221.

It can be written as a sum of positive squares in 2 ways, for example, as 1211666481 + 12117361 = 34809^2 + 3481^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1223783795 and 1223783804.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324643 + ... + 328390.

Almost surely, 2^1223783842 is an apocalyptic number.

1223783842 is a deficient number, since it is larger than the sum of its proper divisors (613853834).

1223783842 is an equidigital number, since it uses as much as digits as its factorization.

1223783842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653972.

The product of its digits is 129024, while the sum is 40.

The square root of 1223783842 is about 34982.6220000731. The cubic root of 1223783842 is about 1069.6332752048.

The spelling of 1223783842 in words is "one billion, two hundred twenty-three million, seven hundred eighty-three thousand, eight hundred forty-two".