1679439994 has 16 divisors (see below), whose sum is σ = 2536691976. Its totient is φ = 833889600.

The previous prime is 1679439989. The next prime is 1679439997. The reversal of 1679439994 is 4999349761.

It can be written as a sum of positive squares in 4 ways, for example, as 1247007969 + 432432025 = 35313^2 + 20795^2 .

It is not an unprimeable number, because it can be changed into a prime (1679439997) 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, 285604 + ... + 291424.

Almost surely, 2^1679439994 is an apocalyptic number.

1679439994 is a deficient number, since it is larger than the sum of its proper divisors (857251982).

1679439994 is a wasteful number, since it uses less digits than its factorization.

1679439994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6801.

The product of its digits is 13226976, while the sum is 61.

The square root of 1679439994 is about 40980.9711207531. The cubic root of 1679439994 is about 1188.6522873035.

The spelling of 1679439994 in words is "one billion, six hundred seventy-nine million, four hundred thirty-nine thousand, nine hundred ninety-four".