1999119601 has 2 divisors, whose sum is σ = 1999119602. Its totient is φ = 1999119600.

The previous prime is 1999119593. The next prime is 1999119613. The reversal of 1999119601 is 1069119991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1950105600 + 49014001 = 44160^2 + 7001^2 .

It is an emirp because it is prime and its reverse (1069119991) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1096116661 and 1666116901.

It is a cyclic number.

It is not a de Polignac number, because 1999119601 - 2³ = 1999119593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1999110601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999559800 + 999559801.

It is an arithmetic number, because the mean of its divisors is an integer number (999559801).

Almost surely, 2^1999119601 is an apocalyptic number.

It is an amenable number.

1999119601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999119601 is an equidigital number, since it uses as much as digits as its factorization.

1999119601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39366, while the sum is 46.

The square root of 1999119601 is about 44711.5153064622. The cubic root of 1999119601 is about 1259.7361505560.

The spelling of 1999119601 in words is "one billion, nine hundred ninety-nine million, one hundred nineteen thousand, six hundred one".