1844919899 has 2 divisors, whose sum is σ = 1844919900. Its totient is φ = 1844919898.

The previous prime is 1844919887. The next prime is 1844919961. The reversal of 1844919899 is 9989194481.

It is an a-pointer prime, because the next prime (1844919961) can be obtained adding 1844919899 to its sum of digits (62).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1844919899 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1844919199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 922459949 + 922459950.

It is an arithmetic number, because the mean of its divisors is an integer number (922459950).

Almost surely, 2^1844919899 is an apocalyptic number.

1844919899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1844919899 is an equidigital number, since it uses as much as digits as its factorization.

1844919899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6718464, while the sum is 62.

The square root of 1844919899 is about 42952.5307636232. The cubic root of 1844919899 is about 1226.4763317320.

The spelling of 1844919899 in words is "one billion, eight hundred forty-four million, nine hundred nineteen thousand, eight hundred ninety-nine".