1683742494 has 128 divisors (see below), whose sum is σ = 4327833600. Its totient is φ = 425658240.

The previous prime is 1683742483. The next prime is 1683742499. The reversal of 1683742494 is 4942473861.

It is a super-2 number, since 2×1683742494² = 5669977572202680072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1683742499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 716229 + ... + 718575.

It is an arithmetic number, because the mean of its divisors is an integer number (33811200).

Almost surely, 2^1683742494 is an apocalyptic number.

1683742494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1683742494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2163916800).

1683742494 is an abundant number, since it is smaller than the sum of its proper divisors (2644091106).

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

1683742494 is a wasteful number, since it uses less digits than its factorization.

1683742494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438.

The product of its digits is 1161216, while the sum is 48.

The square root of 1683742494 is about 41033.4314187834. The cubic root of 1683742494 is about 1189.6664776311. Note that the first 3 decimals are identical.

The spelling of 1683742494 in words is "one billion, six hundred eighty-three million, seven hundred forty-two thousand, four hundred ninety-four".