1990053 has 24 divisors (see below), whose sum is σ = 3151512. Its totient is φ = 1202688.

The previous prime is 1990039. The next prime is 1990069. The reversal of 1990053 is 3500991.

It can be written as a sum of positive squares in 4 ways, for example, as 10404 + 1979649 = 102^2 + 1407^2 .

It is not a de Polignac number, because 1990053 - 2⁶ = 1989989 is a prime.

1990053 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1989999 and 1990026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990033) 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 23 ways as a sum of consecutive naturals, for example, 8425 + ... + 8657.

It is an arithmetic number, because the mean of its divisors is an integer number (131313).

2^1990053 is an apocalyptic number.

1990053 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1990053 is a deficient number, since it is larger than the sum of its proper divisors (1161459).

1990053 is a wasteful number, since it uses less digits than its factorization.

1990053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 1215, while the sum is 27.

The square root of 1990053 is about 1410.6923831934. The cubic root of 1990053 is about 125.7828838400.

The spelling of 1990053 in words is "one million, nine hundred ninety thousand, fifty-three".