1906193 has 4 divisors (see below), whose sum is σ = 2018340.
Its totient is φ = 1794048.
The previous prime is 1906187. The next prime is 1906211. The reversal of 1906193 is 3916091.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 588289 + 1317904 = 767^2 + 1148^2
It is a cyclic number.
It is not a de Polignac number, because 1906193 - 212 = 1902097 is a prime.
It is a Duffinian number.
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (1906123) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56048 + ... + 56081.
It is an arithmetic number, because the mean of its divisors is an integer number (504585).
21906193 is an apocalyptic number.
It is an amenable number.
1906193 is a deficient number, since it is larger than the sum of its proper divisors (112147).
1906193 is a wasteful number, since it uses less digits than its factorization.
1906193 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 112146.
The product of its (nonzero) digits is 1458, while the sum is 29.
The square root of 1906193 is about 1380.6494848440.
The cubic root of 1906193 is about 123.9906557301.
The spelling of 1906193 in words is "one million, nine hundred six thousand, one hundred ninety-three".