1683971165 has 4 divisors (see below), whose sum is σ = 2020765404. Its totient is φ = 1347176928.

The previous prime is 1683971153. The next prime is 1683971171. The reversal of 1683971165 is 5611793861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 481407481 + 1202563684 = 21941^2 + 34678^2 .

It is a cyclic number.

It is not a de Polignac number, because 1683971165 - 2²⁰ = 1682922589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168397112 + ... + 168397121.

It is an arithmetic number, because the mean of its divisors is an integer number (505191351).

Almost surely, 2^1683971165 is an apocalyptic number.

It is an amenable number.

1683971165 is a deficient number, since it is larger than the sum of its proper divisors (336794239).

1683971165 is an equidigital number, since it uses as much as digits as its factorization.

1683971165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336794238.

The product of its digits is 272160, while the sum is 47.

The square root of 1683971165 is about 41036.2177228847. The cubic root of 1683971165 is about 1189.7203318497.

The spelling of 1683971165 in words is "one billion, six hundred eighty-three million, nine hundred seventy-one thousand, one hundred sixty-five".