1990929 has 8 divisors (see below), whose sum is σ = 2691232. Its totient is φ = 1308960.

The previous prime is 1990927. The next prime is 1990939. The reversal of 1990929 is 9290991.

It is a happy number.

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

It is not a de Polignac number, because 1990929 - 2¹ = 1990927 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1990927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4327 + ... + 4764.

It is an arithmetic number, because the mean of its divisors is an integer number (336404).

2^1990929 is an apocalyptic number.

It is an amenable number.

1990929 is a deficient number, since it is larger than the sum of its proper divisors (700303).

1990929 is an equidigital number, since it uses as much as digits as its factorization.

1990929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9167.

The product of its (nonzero) digits is 13122, while the sum is 39.

The square root of 1990929 is about 1411.0028348660. The cubic root of 1990929 is about 125.8013372250.

The spelling of 1990929 in words is "one million, nine hundred ninety thousand, nine hundred twenty-nine".