1683375381 has 6 divisors (see below), whose sum is σ = 2431542230. Its totient is φ = 1122250248.

The previous prime is 1683375367. The next prime is 1683375389. The reversal of 1683375381 is 1835733861.

1683375381 is a `hidden beast` number, since 1 + 6 + 83 + 37 + 538 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1540955025 + 142420356 = 39255^2 + 11934^2 .

It is not a de Polignac number, because 1683375381 - 2⁵ = 1683375349 is a prime.

It is a super-2 number, since 2×1683375381² = 5667505346713790322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1683375389) 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 5 ways as a sum of consecutive naturals, for example, 93520846 + ... + 93520863.

Almost surely, 2^1683375381 is an apocalyptic number.

It is an amenable number.

1683375381 is a deficient number, since it is larger than the sum of its proper divisors (748166849).

1683375381 is a wasteful number, since it uses less digits than its factorization.

1683375381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187041715 (or 187041712 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 1683375381 is about 41028.9578346806. The cubic root of 1683375381 is about 1189.5800087923.

The spelling of 1683375381 in words is "one billion, six hundred eighty-three million, three hundred seventy-five thousand, three hundred eighty-one".