1999550027 has 4 divisors (see below), whose sum is σ = 2037277440. Its totient is φ = 1961822616.

The previous prime is 1999550023. The next prime is 1999550083. The reversal of 1999550027 is 7200559991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1999550027 - 2² = 1999550023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1999550023) 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 in 3 ways as a sum of consecutive naturals, for example, 18863627 + ... + 18863732.

It is an arithmetic number, because the mean of its divisors is an integer number (509319360).

Almost surely, 2^1999550027 is an apocalyptic number.

1999550027 is a deficient number, since it is larger than the sum of its proper divisors (37727413).

1999550027 is an equidigital number, since it uses as much as digits as its factorization.

1999550027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37727412.

The product of its (nonzero) digits is 255150, while the sum is 47.

The square root of 1999550027 is about 44716.3284159154. The cubic root of 1999550027 is about 1259.8265543987.

The spelling of 1999550027 in words is "one billion, nine hundred ninety-nine million, five hundred fifty thousand, twenty-seven".