1999361 has 16 divisors (see below), whose sum is σ = 2494464. Its totient is φ = 1560384.

The previous prime is 1999343. The next prime is 1999363. The reversal of 1999361 is 1639991.

It is not a de Polignac number, because 1999361 - 2⁶ = 1999297 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1999363) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 11471 + ... + 11643.

It is an arithmetic number, because the mean of its divisors is an integer number (155904).

2^1999361 is an apocalyptic number.

It is an amenable number.

1999361 is a deficient number, since it is larger than the sum of its proper divisors (495103).

1999361 is a wasteful number, since it uses less digits than its factorization.

1999361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320.

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

The square root of 1999361 is about 1413.9876237082. The cubic root of 1999361 is about 125.9786854010.

The spelling of 1999361 in words is "one million, nine hundred ninety-nine thousand, three hundred sixty-one".