1679999999 has 2 divisors, whose sum is σ = 1680000000. Its totient is φ = 1679999998.

The previous prime is 1679999983. The next prime is 1680000013. The reversal of 1679999999 is 9999999761.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1679999999 - 2⁴ = 1679999983 is a prime.

1679999999 is a modest number, since divided by 99999 gives 16799 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1679999599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839999999 + 840000000.

It is an arithmetic number, because the mean of its divisors is an integer number (840000000).

Almost surely, 2^1679999999 is an apocalyptic number.

1679999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1679999999 is an equidigital number, since it uses as much as digits as its factorization.

1679999999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 200884698, while the sum is 77.

The square root of 1679999999 is about 40987.8030516396. The cubic root of 1679999999 is about 1188.7843903168.

The spelling of 1679999999 in words is "one billion, six hundred seventy-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".