1683979020 has 72 divisors (see below), whose sum is σ = 5113639440. Its totient is φ = 448571520.

The previous prime is 1683979009. The next prime is 1683979021. The reversal of 1683979020 is 209793861.

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 not an unprimeable number, because it can be changed into a prime (1683979021) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 178830 + ... + 188010.

It is an arithmetic number, because the mean of its divisors is an integer number (71022770).

Almost surely, 2^1683979020 is an apocalyptic number.

1683979020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1683979020 is an abundant number, since it is smaller than the sum of its proper divisors (3429660420).

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

1683979020 is a wasteful number, since it uses less digits than its factorization.

1683979020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10215 (or 10210 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 1683979020 is about 41036.3134309114. The cubic root of 1683979020 is about 1189.7221816910.

It can be divided in two parts, 16839 and 79020, that added together give a palindrome (95859).

The spelling of 1683979020 in words is "one billion, six hundred eighty-three million, nine hundred seventy-nine thousand, twenty".