1900166 has 4 divisors (see below), whose sum is σ = 2850252. Its totient is φ = 950082.

The previous prime is 1900159. The next prime is 1900169. The reversal of 1900166 is 6610091.

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

It is a super-2 number, since 2×1900166² = 7221261655112, which contains 22 as substring.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900169) 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 as a sum of consecutive naturals, namely, 475040 + ... + 475043.

It is an arithmetic number, because the mean of its divisors is an integer number (712563).

2^1900166 is an apocalyptic number.

1900166 is a deficient number, since it is larger than the sum of its proper divisors (950086).

1900166 is an equidigital number, since it uses as much as digits as its factorization.

1900166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950085.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1900166 is about 1378.4650884226. The cubic root of 1900166 is about 123.8598398991.

The spelling of 1900166 in words is "one million, nine hundred thousand, one hundred sixty-six".