1990223 has 2 divisors, whose sum is σ = 1990224. Its totient is φ = 1990222.

The previous prime is 1990211. The next prime is 1990229. The reversal of 1990223 is 3220991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1990223 - 2⁶ = 1990159 is a prime.

It is equal to p₁₄₈₂₃₈ and since 1990223 and 148238 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 1990192 and 1990201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1990229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995111 + 995112.

It is an arithmetic number, because the mean of its divisors is an integer number (995112).

2^1990223 is an apocalyptic number.

1990223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990223 is an equidigital number, since it uses as much as digits as its factorization.

1990223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1990223 is about 1410.7526360068. The cubic root of 1990223 is about 125.7864653998.

The spelling of 1990223 in words is "one million, nine hundred ninety thousand, two hundred twenty-three".