1990837 has 8 divisors (see below), whose sum is σ = 2076480. Its totient is φ = 1907040.

The previous prime is 1990831. The next prime is 1990867. The reversal of 1990837 is 7380991.

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 1990837 - 2³ = 1990829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1990796 and 1990805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2008 + ... + 2830.

It is an arithmetic number, because the mean of its divisors is an integer number (259560).

2^1990837 is an apocalyptic number.

It is an amenable number.

1990837 is a deficient number, since it is larger than the sum of its proper divisors (85643).

1990837 is an equidigital number, since it uses as much as digits as its factorization.

1990837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1990837 is about 1410.9702335627. The cubic root of 1990837 is about 125.7993994527.

The spelling of 1990837 in words is "one million, nine hundred ninety thousand, eight hundred thirty-seven".