1681504114 has 4 divisors (see below), whose sum is σ = 2522256174. Its totient is φ = 840752056.

The previous prime is 1681504091. The next prime is 1681504117. The reversal of 1681504114 is 4114051861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4114051861 = 2333 ⋅1763417.

It can be written as a sum of positive squares in only one way, i.e., 1614673489 + 66830625 = 40183^2 + 8175^2 .

It is not an unprimeable number, because it can be changed into a prime (1681504117) 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 as a sum of consecutive naturals, namely, 420376027 + ... + 420376030.

Almost surely, 2^1681504114 is an apocalyptic number.

1681504114 is a deficient number, since it is larger than the sum of its proper divisors (840752060).

1681504114 is an equidigital number, since it uses as much as digits as its factorization.

1681504114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840752059.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 1681504114 is about 41006.1472708666. The cubic root of 1681504114 is about 1189.1390599748.

Adding to 1681504114 its reverse (4114051861), we get a palindrome (5795555975).

The spelling of 1681504114 in words is "one billion, six hundred eighty-one million, five hundred four thousand, one hundred fourteen".