1990653 has 8 divisors (see below), whose sum is σ = 3033408. Its totient is φ = 1137504.

The previous prime is 1990643. The next prime is 1990657. The reversal of 1990653 is 3560991.

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

It is not a de Polignac number, because 1990653 - 2⁵ = 1990621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47376 + ... + 47417.

It is an arithmetic number, because the mean of its divisors is an integer number (379176).

2^1990653 is an apocalyptic number.

It is an amenable number.

1990653 is a deficient number, since it is larger than the sum of its proper divisors (1042755).

1990653 is an equidigital number, since it uses as much as digits as its factorization.

1990653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94803.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 1990653 is about 1410.9050286961. The cubic root of 1990653 is about 125.7955237290.

The spelling of 1990653 in words is "one million, nine hundred ninety thousand, six hundred fifty-three".