1683720117 has 24 divisors (see below), whose sum is σ = 2472229760. Its totient is φ = 1103984640.

The previous prime is 1683720089. The next prime is 1683720119. The reversal of 1683720117 is 7110273861.

It is not a de Polignac number, because 1683720117 - 2⁸ = 1683719861 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 (1683720119) 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, 461892 + ... + 465522.

Almost surely, 2^1683720117 is an apocalyptic number.

It is an amenable number.

1683720117 is a deficient number, since it is larger than the sum of its proper divisors (788509643).

1683720117 is a wasteful number, since it uses less digits than its factorization.

1683720117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4473 (or 4470 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 1683720117 is about 41033.1587499671. The cubic root of 1683720117 is about 1189.6612073706.

Adding to 1683720117 its reverse (7110273861), we get a palindrome (8793993978).

The spelling of 1683720117 in words is "one billion, six hundred eighty-three million, seven hundred twenty thousand, one hundred seventeen".