1681719434 has 8 divisors (see below), whose sum is σ = 2603952768. Its totient is φ = 813735180.

The previous prime is 1681719433. The next prime is 1681719461. The reversal of 1681719434 is 4349171861.

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

It is not an unprimeable number, because it can be changed into a prime (1681719433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13562192 + ... + 13562315.

It is an arithmetic number, because the mean of its divisors is an integer number (325494096).

Almost surely, 2^1681719434 is an apocalyptic number.

1681719434 is a deficient number, since it is larger than the sum of its proper divisors (922233334).

1681719434 is a wasteful number, since it uses less digits than its factorization.

1681719434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27124540.

The product of its digits is 145152, while the sum is 44.

The square root of 1681719434 is about 41008.7726468374. The cubic root of 1681719434 is about 1189.1898150283.

The spelling of 1681719434 in words is "one billion, six hundred eighty-one million, seven hundred nineteen thousand, four hundred thirty-four".