1984423019 has 2 divisors, whose sum is σ = 1984423020. Its totient is φ = 1984423018.

The previous prime is 1984422997. The next prime is 1984423027. The reversal of 1984423019 is 9103244891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1984423019 - 2²⁰ = 1983374443 is a prime.

It is a super-2 number, since 2×1984423019² = 7875869436674148722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1984423079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992211509 + 992211510.

It is an arithmetic number, because the mean of its divisors is an integer number (992211510).

Almost surely, 2^1984423019 is an apocalyptic number.

1984423019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984423019 is an equidigital number, since it uses as much as digits as its factorization.

1984423019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1984423019 is about 44546.8631780061. The cubic root of 1984423019 is about 1256.6415599666.

The spelling of 1984423019 in words is "one billion, nine hundred eighty-four million, four hundred twenty-three thousand, nineteen".