1679684919 has 16 divisors (see below), whose sum is σ = 2495162880. Its totient is φ = 996330560.

The previous prime is 1679684899. The next prime is 1679684921. The reversal of 1679684919 is 9194869761.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1679684919 - 2⁸ = 1679684663 is a prime.

It is a super-2 number, since 2×1679684919² = 5642682854232073122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679684969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539934 + ... + 543035.

It is an arithmetic number, because the mean of its divisors is an integer number (155947680).

Almost surely, 2^1679684919 is an apocalyptic number.

1679684919 is a deficient number, since it is larger than the sum of its proper divisors (815477961).

1679684919 is a wasteful number, since it uses less digits than its factorization.

1679684919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083030.

The product of its digits is 5878656, while the sum is 60.

The square root of 1679684919 is about 40983.9592889706. The cubic root of 1679684919 is about 1188.7100677762.

The spelling of 1679684919 in words is "one billion, six hundred seventy-nine million, six hundred eighty-four thousand, nine hundred nineteen".