1679739349 has 4 divisors (see below), whose sum is σ = 1778547564. Its totient is φ = 1580931136.

The previous prime is 1679739343. The next prime is 1679739419. The reversal of 1679739349 is 9439379761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 758616849 + 921122500 = 27543^2 + 30350^2 .

It is a cyclic number.

It is not a de Polignac number, because 1679739349 - 2⁷ = 1679739221 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1679739293 and 1679739302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679739343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49404082 + ... + 49404115.

It is an arithmetic number, because the mean of its divisors is an integer number (444636891).

Almost surely, 2^1679739349 is an apocalyptic number.

It is an amenable number.

1679739349 is a deficient number, since it is larger than the sum of its proper divisors (98808215).

1679739349 is an equidigital number, since it uses as much as digits as its factorization.

1679739349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98808214.

The product of its digits is 7715736, while the sum is 58.

The square root of 1679739349 is about 40984.6233238760. The cubic root of 1679739349 is about 1188.7229076426.

The spelling of 1679739349 in words is "one billion, six hundred seventy-nine million, seven hundred thirty-nine thousand, three hundred forty-nine".