1941999 has 4 divisors (see below), whose sum is σ = 2589336. Its totient is φ = 1294664.

The previous prime is 1941983. The next prime is 1942001. The reversal of 1941999 is 9991491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9991491 = 3 ⋅3330497.

It is a cyclic number.

It is not a de Polignac number, because 1941999 - 2⁴ = 1941983 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1941999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1941799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323664 + ... + 323669.

It is an arithmetic number, because the mean of its divisors is an integer number (647334).

2^1941999 is an apocalyptic number.

1941999 is a deficient number, since it is larger than the sum of its proper divisors (647337).

1941999 is an equidigital number, since it uses as much as digits as its factorization.

1941999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647336.

The product of its digits is 26244, while the sum is 42.

The square root of 1941999 is about 1393.5562421374. The cubic root of 1941999 is about 124.7621932037.

The spelling of 1941999 in words is "one million, nine hundred forty-one thousand, nine hundred ninety-nine".