1683831690 has 24 divisors (see below), whose sum is σ = 4377962628. Its totient is φ = 449021760.

The previous prime is 1683831689. The next prime is 1683831713. The reversal of 1683831690 is 961383861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1637578089 + 46253601 = 40467^2 + 6801^2 .

It is a super-2 number, since 2×1683831690² = 5670578320496512200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9354531 + ... + 9354710.

Almost surely, 2^1683831690 is an apocalyptic number.

1683831690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1683831690 is an abundant number, since it is smaller than the sum of its proper divisors (2694130938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1683831690 is a wasteful number, since it uses less digits than its factorization.

1683831690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18709254 (or 18709251 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 1683831690 is about 41034.5182742530. The cubic root of 1683831690 is about 1189.6874847265.

The spelling of 1683831690 in words is "one billion, six hundred eighty-three million, eight hundred thirty-one thousand, six hundred ninety".