1999136 has 12 divisors (see below), whose sum is σ = 3935862. Its totient is φ = 999552.

The previous prime is 1999121. The next prime is 1999163. The reversal of 1999136 is 6319991.

It can be written as a sum of positive squares in only one way, i.e., 1690000 + 309136 = 1300^2 + 556^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1999136.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31205 + ... + 31268.

2^1999136 is an apocalyptic number.

1999136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1999136 is a deficient number, since it is larger than the sum of its proper divisors (1936726).

1999136 is an equidigital number, since it uses as much as digits as its factorization.

1999136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62483 (or 62475 counting only the distinct ones).

The product of its digits is 13122, while the sum is 38.

The square root of 1999136 is about 1413.9080592457. The cubic root of 1999136 is about 125.9739595132.

The spelling of 1999136 in words is "one million, nine hundred ninety-nine thousand, one hundred thirty-six".