1123420019 has 2 divisors, whose sum is σ = 1123420020. Its totient is φ = 1123420018.

The previous prime is 1123419977. The next prime is 1123420037. The reversal of 1123420019 is 9100243211.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123420019 is a prime.

It is a super-2 number, since 2×1123420019² = 2524145078179920722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1123419976 and 1123420003.

It is not a weakly prime, because it can be changed into another prime (1123420069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561710009 + 561710010.

It is an arithmetic number, because the mean of its divisors is an integer number (561710010).

Almost surely, 2^1123420019 is an apocalyptic number.

1123420019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123420019 is an equidigital number, since it uses as much as digits as its factorization.

1123420019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1123420019 is about 33517.4584209483. The cubic root of 1123420019 is about 1039.5547955752.

The spelling of 1123420019 in words is "one billion, one hundred twenty-three million, four hundred twenty thousand, nineteen".