1683605890 has 32 divisors (see below), whose sum is σ = 3056901120. Its totient is φ = 667598400.

The previous prime is 1683605881. The next prime is 1683605899. The reversal of 1683605890 is 985063861.

It is an interprime number because it is at equal distance from previous prime (1683605881) and next prime (1683605899).

It is a self number, because there is not a number n which added to its sum of digits gives 1683605890.

It is not an unprimeable number, because it can be changed into a prime (1683605899) 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 in 15 ways as a sum of consecutive naturals, for example, 648495 + ... + 651085.

It is an arithmetic number, because the mean of its divisors is an integer number (95528160).

Almost surely, 2^1683605890 is an apocalyptic number.

1683605890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1683605890 is a deficient number, since it is larger than the sum of its proper divisors (1373295230).

1683605890 is a wasteful number, since it uses less digits than its factorization.

1683605890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3138.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 1683605890 is about 41031.7668398523. The cubic root of 1683605890 is about 1189.6343037496.

The spelling of 1683605890 in words is "one billion, six hundred eighty-three million, six hundred five thousand, eight hundred ninety".