1683969912 has 80 divisors (see below), whose sum is σ = 4879373400. Its totient is φ = 541961280.

The previous prime is 1683969899. The next prime is 1683969929. The reversal of 1683969912 is 2199693861.

1683969912 is a `hidden beast` number, since 168 + 396 + 9 + 91 + 2 = 666.

It is a super-3 number, since 3×1683969912³ (a number of 29 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (54) 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 (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26014 + ... + 63597.

Almost surely, 2^1683969912 is an apocalyptic number.

1683969912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1683969912 is an abundant number, since it is smaller than the sum of its proper divisors (3195403488).

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

1683969912 is a wasteful number, since it uses less digits than its factorization.

1683969912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89658 (or 89645 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 1683969912 is about 41036.2024558803. The cubic root of 1683969912 is about 1189.7200367694.

The spelling of 1683969912 in words is "one billion, six hundred eighty-three million, nine hundred sixty-nine thousand, nine hundred twelve".