1790221682 has 4 divisors (see below), whose sum is σ = 2685332526. Its totient is φ = 895110840.

The previous prime is 1790221673. The next prime is 1790221691. The reversal of 1790221682 is 2861220971.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2861220971 = 7 ⋅408745853.

It is an interprime number because it is at equal distance from previous prime (1790221673) and next prime (1790221691).

It can be written as a sum of positive squares in only one way, i.e., 1790220721 + 961 = 42311^2 + 31^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447555419 + ... + 447555422.

Almost surely, 2^1790221682 is an apocalyptic number.

1790221682 is a deficient number, since it is larger than the sum of its proper divisors (895110844).

1790221682 is an equidigital number, since it uses as much as digits as its factorization.

1790221682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895110843.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1790221682 is about 42311.0113563833. The cubic root of 1790221682 is about 1214.2336685065.

The spelling of 1790221682 in words is "one billion, seven hundred ninety million, two hundred twenty-one thousand, six hundred eighty-two".