1682718109 has 12 divisors (see below), whose sum is σ = 1800299676. Its totient is φ = 1572291648.

The previous prime is 1682718067. The next prime is 1682718113. The reversal of 1682718109 is 9018172861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 447195609 + 1235522500 = 21147^2 + 35150^2 .

It is not a de Polignac number, because 1682718109 - 2²⁷ = 1548500381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1682718119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5574 + ... + 58279.

It is an arithmetic number, because the mean of its divisors is an integer number (150024973).

Almost surely, 2^1682718109 is an apocalyptic number.

1682718109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1682718109 is a deficient number, since it is larger than the sum of its proper divisors (117581567).

1682718109 is an equidigital number, since it uses as much as digits as its factorization.

1682718109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63964 (or 63945 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 43.

The square root of 1682718109 is about 41020.9471977428. The cubic root of 1682718109 is about 1189.4251652513.

The spelling of 1682718109 in words is "one billion, six hundred eighty-two million, seven hundred eighteen thousand, one hundred nine".