1681523834 has 8 divisors (see below), whose sum is σ = 2524716480. Its totient is φ = 839951676.

The previous prime is 1681523821. The next prime is 1681523881. The reversal of 1681523834 is 4383251861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1681523791 and 1681523800.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402524 + ... + 406679.

It is an arithmetic number, because the mean of its divisors is an integer number (315589560).

Almost surely, 2^1681523834 is an apocalyptic number.

1681523834 is a deficient number, since it is larger than the sum of its proper divisors (843192646).

1681523834 is a wasteful number, since it uses less digits than its factorization.

1681523834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810244.

The product of its digits is 138240, while the sum is 41.

The square root of 1681523834 is about 41006.3877219147. The cubic root of 1681523834 is about 1189.1437085372.

The spelling of 1681523834 in words is "one billion, six hundred eighty-one million, five hundred twenty-three thousand, eight hundred thirty-four".