1679516779 has 8 divisors (see below), whose sum is σ = 1697440752. Its totient is φ = 1661618400.

The previous prime is 1679516749. The next prime is 1679516821. The reversal of 1679516779 is 9776159761.

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

It is a cyclic number.

It is not a de Polignac number, because 1679516779 - 2¹¹ = 1679514731 is a prime.

It is a super-2 number, since 2×1679516779² = 5641553221885069682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1679516719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144177 + ... + 155389.

It is an arithmetic number, because the mean of its divisors is an integer number (212180094).

Almost surely, 2^1679516779 is an apocalyptic number.

1679516779 is a deficient number, since it is larger than the sum of its proper divisors (17923973).

1679516779 is a wasteful number, since it uses less digits than its factorization.

1679516779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12797.

The product of its digits is 5000940, while the sum is 58.

The square root of 1679516779 is about 40981.9079472882. The cubic root of 1679516779 is about 1188.6704023250.

The spelling of 1679516779 in words is "one billion, six hundred seventy-nine million, five hundred sixteen thousand, seven hundred seventy-nine".