1681348917 has 16 divisors (see below), whose sum is σ = 2283425280. Its totient is φ = 1100164800.

The previous prime is 1681348913. The next prime is 1681348927. The reversal of 1681348917 is 7198431861.

It is not a de Polignac number, because 1681348917 - 2² = 1681348913 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681348913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78067 + ... + 97247.

It is an arithmetic number, because the mean of its divisors is an integer number (142714080).

Almost surely, 2^1681348917 is an apocalyptic number.

It is an amenable number.

1681348917 is a deficient number, since it is larger than the sum of its proper divisors (602076363).

1681348917 is a wasteful number, since it uses less digits than its factorization.

1681348917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19724.

The product of its digits is 290304, while the sum is 48.

The square root of 1681348917 is about 41004.2548645869. The cubic root of 1681348917 is about 1189.1024743783.

The spelling of 1681348917 in words is "one billion, six hundred eighty-one million, three hundred forty-eight thousand, nine hundred seventeen".