1990339 has 8 divisors (see below), whose sum is σ = 2154992. Its totient is φ = 1827360.

The previous prime is 1990337. The next prime is 1990361. The reversal of 1990339 is 9330991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1990339 - 2¹ = 1990337 is a prime.

It is a super-2 number, since 2×1990339² = 7922898669842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1990337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3409 + ... + 3949.

It is an arithmetic number, because the mean of its divisors is an integer number (269374).

2^1990339 is an apocalyptic number.

1990339 is a deficient number, since it is larger than the sum of its proper divisors (164653).

1990339 is a wasteful number, since it uses less digits than its factorization.

1990339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 1990339 is about 1410.7937482141. The cubic root of 1990339 is about 125.7889091706.

The spelling of 1990339 in words is "one million, nine hundred ninety thousand, three hundred thirty-nine".