1906223 has 4 divisors (see below), whose sum is σ = 2079528. Its totient is φ = 1732920.

The previous prime is 1906211. The next prime is 1906237. The reversal of 1906223 is 3226091.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1906223 - 2¹⁰ = 1905199 is a prime.

It is a super-2 number, since 2×1906223² = 7267372251458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906243) 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, 86636 + ... + 86657.

It is an arithmetic number, because the mean of its divisors is an integer number (519882).

2^1906223 is an apocalyptic number.

1906223 is a deficient number, since it is larger than the sum of its proper divisors (173305).

1906223 is a wasteful number, since it uses less digits than its factorization.

1906223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173304.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1906223 is about 1380.6603492532. The cubic root of 1906223 is about 123.9913061890.

The spelling of 1906223 in words is "one million, nine hundred six thousand, two hundred twenty-three".