1990193 has 12 divisors (see below), whose sum is σ = 2171700. Its totient is φ = 1822176.

The previous prime is 1990189. The next prime is 1990211. The reversal of 1990193 is 3910991.

It can be written as a sum of positive squares in 2 ways, for example, as 1014049 + 976144 = 1007^2 + 988^2 .

It is not a de Polignac number, because 1990193 - 2² = 1990189 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1990103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13283 + ... + 13431.

It is an arithmetic number, because the mean of its divisors is an integer number (180975).

2^1990193 is an apocalyptic number.

It is an amenable number.

1990193 is a deficient number, since it is larger than the sum of its proper divisors (181507).

1990193 is a wasteful number, since it uses less digits than its factorization.

1990193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 1990193 is about 1410.7420033443. The cubic root of 1990193 is about 125.7858333746.

The spelling of 1990193 in words is "one million, nine hundred ninety thousand, one hundred ninety-three".